Reference

Glossary, temperature and time standards, allergens, presentation and troubleshooting for beverage operations.

Barista & beverage-operations glossary

Dial-in: Adjusting grind, dose, and/or time until a brew or shot hits its target spec.
Purge: Releasing a short burst of grounds, water, or steam from equipment before use, to clear stale material or check flow.
Dead shot: An espresso shot left standing too long after extraction (roughly 10+ seconds) — discarded and re-pulled, never served or combined into a drink.
Bloom: The initial wetting of a coffee bed in pour-over or batch brewing, releasing trapped CO₂ before the main pours.
Drawdown: The time it takes water to fully pass through a coffee bed in a pour-over brew.
Channeling: Water finding an uneven path through the coffee bed instead of flowing evenly, causing inconsistent extraction.
Crema: The golden-brown foam layer on top of a freshly pulled espresso shot.
Microfoam: Finely and evenly textured steamed milk foam with no visible large bubbles, used for latte art and smooth milk drinks.
Tamp: Compressing ground coffee evenly in a portafilter basket before extraction.
Portafilter: The handled fitting that holds the coffee basket and locks into an espresso machine's group head.
Basket: The perforated metal insert inside a portafilter that holds the coffee dose.
Backflush: A cleaning cycle that runs water — sometimes with a detergent — backward through an espresso machine's group head to clear built-up coffee oils and residue.
WDT: Weiss Distribution Technique — stirring dry grounds with fine pins before tamping, to reduce clumping and channeling.
FIFO / FEFO: First In First Out / First Expired First Out — stock-rotation rules ensuring older or soon-to-expire stock is used before newer stock.
Par level: The target quantity of an item that should be on hand or prepared for a given period.
Reorder point: The stock level at which a new order should be placed so replacement stock arrives before the item runs out.
Safety stock: A buffer quantity held above calculated need, to absorb demand spikes or supplier delays.
TDS: Total Dissolved Solids — the measured mineral/solute content of water or brewed coffee, used to judge water suitability and calculate extraction yield.
EY (Extraction Yield): The percentage of dry coffee's mass that ends up dissolved in the brewed drink, calculated from TDS and the brew's dose/yield.
PPM: Parts per million — a common unit for expressing dissolved mineral concentration in water.
Refractometer: An instrument that measures TDS in a liquid sample by how it bends light, used in coffee to measure brew strength.
Cupping: The standardized sensory-evaluation method used to taste and score coffee.
HACCP: Hazard Analysis and Critical Control Points — a systematic food-safety framework for identifying and controlling risk at each handling step.
TCS food: Time/Temperature Control for Safety food — an item that specifically requires temperature or time control to remain safe (e.g. dairy, prepared perishables).
Danger zone: The temperature range, roughly 5–60°C, in which bacteria multiply fastest in food and drink.
SOP: Standard Operating Procedure — a documented, repeatable method for carrying out a task consistently.
COGS: Cost of Goods Sold — the direct ingredient/material cost of producing what's sold.
GP: Gross Profit — revenue minus COGS.
ABC analysis: A classic inventory classification splitting items into A (top ~80% of value), B (next ~15%), and C (remaining ~5%) tiers.
Mouthfeel: The tactile weight and texture of a drink in the mouth (light, syrupy, silky, etc.), distinct from its taste or aroma.
Sauce pump: A bar pump for thick products — chocolate, caramel, pistachio. 15 ml per full stroke, measured by the owner on the venue's own equipment; calibrate yours with ten strokes into a graduated cylinder.
Syrup pump: A bar pump for thin products — vanilla, hazelnut, the flavoured 1:1 range. 10 ml per full stroke, measured by the owner on the venue’s own equipment; calibrate yours with ten strokes into a graduated cylinder.

Beverage presentation & glassware standards

Beverage category	Typical glassware	Presentation notes
Hot beverages (coffee, tea, hot chocolate)	Porcelain cup/mug or heat-resistant glass, on a saucer	Napkin, stirrer, and sweetener alongside; serve promptly so it reaches the guest at temperature
Cold coffee & tea	Tall glass, ice visible and clear	Straw offered if appropriate; keep garnish (citrus peel, mint) simple and fresh
Alcohol-free and specialty drinks	A glass suited to the drink's style (highball, coupe, etc.)	Fresh garnish placed for visual impact; consistent portioning matters as much as looks
Fresh juices	Juice tumbler or highball	Fruit-slice garnish matching the juice; serve promptly since fresh juice separates and oxidizes over time
Smoothies & milkshakes	Tall or footed glass, chilled	Straw sized for a thick drink; toppings applied just before service so they don't melt or sink

Temperature & time master reference

Process / item	Temperature	Time / hold limit
Espresso extraction	Water 90–96°C	25–30 s per double shot
Espresso — serve window	—	Pour within 10 s of extraction
Steamed milk	55–65°C — never re-steam	To spec volume only
Pour-over (V60)	Water 92–96°C	Bloom 30 s · total 2:30–3:00 · 1:16.7 ratio
Batch / filter brew	Hold in thermal server	~60 g/L · discard after ~2 h
Cold brew concentrate	Room temp or refrigerated	Steep 16–18 h @ 1:8 · keep ≤ 7 days
Turkish coffee	Heat to rising foam — never boil	Serve within ~90 s of dose
Black tea	95–100°C	Steep 3–5 min
Green / white tea	70–85°C	Steep 2–3 min
Oolong tea	85–95°C	Short steep, often re-steeped
Herbal infusion	Near-boiling	Steep 5+ min
Cold chain (dairy, prepped perishables)	≤ 4°C	FIFO/FEFO · opened items per label
Hot holding (TCS food)	≥ 60°C	Measured and recorded regularly
Danger zone	5–60°C	Minimize time spent in this range
Iced & cold drinks — serve	Full ice, chilled	Build and serve promptly

Allergen & dietary reference matrix

Beverage group	Dairy	Caffeine	Nuts	Gluten	Vegan-friendly
Black coffee & espresso (no milk)	—	●	—	—	●
Milk-based coffee drinks	●	●	○ (if nut milk used)	—	○ (with plant milk)
Tea & herbal infusions	—	○ (true tea only)	—	—	●
Traditional yogurt/milk drinks (ayran, kefir, salep)	●	—	○	—	✗
Fresh juices & lemonades	—	—	—	—	●
Smoothies & milkshakes	●	○	○	○	○ (with plant milk)
Alcohol-free drinks	—	○	○	—	●

Cross-method troubleshooting quick reference

Symptom	Likely cause	Correction
Espresso runs fast, tastes thin/sour	Grind too coarse, or dose too low	Grind finer and/or increase dose; re-check ratio and time
Espresso runs slow, tastes bitter/harsh	Grind too fine, or dose too high, or stale coffee	Grind coarser and/or reduce dose; check roast date
No or very thin crema	Stale beans, or uneven distribution/tamp causing channeling	Check roast date; redistribute and tamp level before locking in
Milk foam is bubbly, not glossy	Air introduced too late or too aggressively, or wand tip mispositioned	Aerate briefly at the very start only, then submerge to texture the rest
Milk tastes scalded or flat	Steamed past the safe temperature range	Stop earlier (mid-60s °C); never re-steam over-heated milk — start fresh
Pour-over tastes bitter/muddy	Over-extraction: grind too fine, brew too long, or a channeled bed	Coarsen the grind slightly, keep pours even and centered, check total brew time
Pour-over tastes weak/sour	Under-extraction: grind too coarse or brew too short	Grind finer, check water temperature, extend contact time slightly
Tea tastes bitter/stewed	Water too hot for the tea type, or steeped too long	Match water temperature to tea type; steep to spec and remove the leaf promptly
Cold brew tastes weak	Under-strength ratio or too short a steep	Use a stronger coffee-to-water ratio and confirm steep time against the method's standard
Iced drink tastes watery	Too little ice, or ice partly melted before building the drink	Fill the glass properly with ice before adding liquid; build cold drinks quickly

Unit Conversions

Category	Unit A	Unit B	Notes
Weight	1 oz	28.35 g (~28 g)	Standard avoirdupois ounce
Weight	1 lb	453.6 g (~454 g)
Weight	100 g	3.53 oz
Weight	1 kg	2.2 lb
Volume	1 fl oz (US)	29.6 ml (~30 ml)
Volume	1 cup (US)	236.6 ml (~237 ml) = 8 fl oz
Volume	1 tbsp (US)	14.8 ml (~15 ml)
Volume	1 tsp (US)	4.9 ml (~5 ml)
Volume	1 L	33.8 fl oz (~4.2 cups)
Temperature	0°C	32°F	Water freezing point
Temperature	100°C	212°F	Water boiling point at sea level
Temperature	90°C	194°F	Lower end of common brewing water range
Temperature	93°C	199°F	Mid-range brewing/extraction temperature
Temperature	96°C	205°F	Upper end of common brewing water range
Temperature	60°C	140°F	Common microfoam/milk-steaming target
Temperature	70°C	158°F	Upper comfort limit before milk scalds
Ratio -> %	1:10	10%	Coffee mass divided by water mass
Ratio -> %	1:12	8.3%
Ratio -> %	1:15	6.7%
Ratio -> %	1:16	6.3%
Ratio -> %	1:17	5.9%
Ratio -> %	1:18	5.6%
Ratio -> %	1:20	5%

Equipment Maintenance Intervals

Equipment	Frequency	Task
Espresso machine	Daily	Purge and wipe steam wand after each use; backflush with blind filter/detergent per manufacturer cycle; empty and rinse drip tray
Espresso machine	Weekly	Soak portafilters, baskets, and dispersion screens in detergent solution; clean group head gaskets
Espresso machine	Monthly (or per water hardness)	Descale according to manufacturer schedule and local water hardness; deep-clean group heads
Grinder	Daily	Brush out chamber and doser of retained grounds; wipe exterior and hopper
Grinder	Weekly	Clean hopper thoroughly; brush accessible burr surfaces
Grinder	As-needed (per manufacturer wear guidance)	Inspect and replace burrs once dulling affects grind consistency and extraction
Water filter	Monthly	Check flow rate and filter-change indicator
Water filter	As-needed (per manufacturer volume/time spec)	Replace cartridge per manufacturer's rated capacity, not by calendar guess alone
Ice machine	Daily	Wipe exterior; keep scoop stored outside the bin, never handle ice by hand (HACCP hygiene practice)
Ice machine	Weekly	Clean and sanitize interior bin surfaces
Ice machine	Per manufacturer/NSF schedule (commonly quarterly)	Full descale and sanitize cycle of the water and ice-making system
Blender	After each use	Disassemble jar and blade assembly; wash and sanitize
Blender	Daily	Wipe down base and motor housing; inspect blade gasket seal
Blender	As-needed	Replace blade assembly or gasket when worn or leaking
Steam wand	After each use	Purge briefly and wipe immediately with a clean, damp cloth to prevent milk residue buildup
Steam wand	Daily	Soak tip in milk-safe detergent solution
Steam wand	Weekly	Deep-clean tip and check steam holes for clogs

Roast & Grind Quick Reference

Category	Item	Use Case / Grind Size	Flavor Tendency / Texture
Roast Level	Light	Pour-over, drip, filter brewing; single-origin tastings	High acidity, pronounced origin/floral/fruit notes, lighter body
Roast Level	Medium	All-purpose drip, pour-over, batch brew	Balanced acidity and body, more caramelized sweetness, origin character still present
Roast Level	Medium-Dark	Espresso, moka pot, milk-based drinks	Lower acidity, fuller body, some caramel/chocolate notes, less origin distinction
Roast Level	Dark	Traditional espresso blends, French press	Low acidity, bold bitter-forward/roasty flavor, heavy body, roast character dominates origin
Grind by Method	Espresso	Fine	Like fine sand or powdered sugar
Grind by Method	Pour-over	Medium	Like coarse sand or granulated sugar
Grind by Method	French Press	Coarse	Like coarse sea salt or breadcrumbs
Grind by Method	Cold Brew	Extra Coarse	Coarser than French press; like peppercorns
Grind by Method	Turkish	Extra Fine (powder)	Like flour or powdered sugar, finer than espresso

Healthy swaps — lighter builds for popular drinks

Drink	Typical kcal	Lighter build	Saves	Trade-off
Latte on whole milk	Whole milk ~61 kcal/100 ml — the milk is nearly all of it	Semi-skim or skim milk, same recipe	Semi-skim ~47, skim ~34 per 100 ml	Thinner mouthfeel; foam less stable (skim foam is dry and collapses fast)
Spanish latte	Condensed milk ~320 kcal/100 ml, weighed on a scale	Order the 15 g build	15 g condensed milk instead of 30 g	A little less of the signature sweetness
Flavored latte	1:1 syrup ~260 kcal/100 ml	Drop to one pump, or a sucralose–stevia syrup (~0)	One pump less	Possible bitter aftertaste with zero-kcal sweeteners
Mocha	Chocolate sauce ~300–350 kcal/100 g (typical — label is final)	Pure cocoa (~230 kcal/100 g) melted in the hot shot	Most of the sauce line	Darker, less candy-sweet cup
Frappe	Frappe powder ~350–400 kcal/100 g plus an ice-cream base	Blend frozen fruit + cold milk — frozen fruit replaces the ice, richer texture without dilution	Large — build-dependent	Loses the emulsifier-stabilized body; separates faster
Milkshake	Ice cream ~200 kcal/100 g before toppings	Fruit smoothie on a milk or yogurt base	Most of the ice-cream line	Thinner body, less dessert-like
Whipped-cream topping	~250–340 kcal/100 g	Skip it, or dust with cinnamon/cocoa	The whole topping	Plainer look, less indulgent finish
Smoothie on commercial purée	Purée ~60–120 kcal/100 g — many are sweetened (label is final)	Whole fresh or frozen fruit	Varies by brand	Shorter hold time and seasonal flavor variation
Fresh juice, large serve	Orange ~45 kcal/100 ml	Smaller serve, or cut with sparkling water (added last, one gentle lift)	Proportional to the pour	Lighter flavor intensity
Tonic-based alcohol-free drink	Tonic ~30–35 kcal/100 ml — sugar + quinine, counts, not zero	Sparkling water + citrus	The whole tonic line	Loses the quinine bitterness that defines it
Always-zero options	~0 kcal	Black espresso & filter coffee, unsweetened tea & herbal infusions, filtered or sparkling water	The whole sugar/fat line	None — the leanest board on the menu

Caffeine guide — per-drink content & daily guidance

Item	Caffeine / guidance	Notes
Double espresso	~120–160 mg	Roast, dose, and blend shift the figure — treat it as a working range
Filter / batch coffee	~40 mg per 100 ml	Scales with the volume poured — a large mug can match a double shot
Black tea	~20 mg per 100 ml	Its tannins also reduce iron absorption — a relevant note for some guests
Matcha (2 g serving)	Whole-leaf caffeine — ~60 mg commonly cited	The whole leaf is consumed, not steeped; paired with L-theanine
Cold brew	Varies with ratio and dilution	Concentrate (steeped ~1:8) is stronger per ml than filter — a diluted serve often still matches or exceeds filter strength
Daily guidance — healthy adults	~400 mg/day commonly cited	Not a medical target — sensitivity varies widely between people
Daily guidance — pregnancy	Much lower — ~200 mg/day commonly cited	Guests should confirm with their own clinician; keep decaf and herbal options ready
Timing & sleep	—	Late-day caffeine is traditionally associated with lighter, shorter sleep; many guests cut off 6–8 hours before bed

Sugar guide — pumps, grams & WHO guidance

Item	Figure / guidance	Practical note
WHO added-sugar guidance	Under 10% of daily energy — ideally under 5%	Commonly cited benchmark; expressed as a share of daily energy, not a fixed weight
White sugar	4 kcal per gram — a level teaspoon ≈ 4 g	The baseline every sweetener converts back to
Sweetened condensed milk	~320 kcal/100 ml — a top sugar line	The Spanish-latte base; weighed on a scale, never poured or pumped
Chocolate & pistachio sauces	~300–450 kcal/100 g (typical — label is final)	Top sugar-and-fat lines; portion by scale or pump, never free-pour
Commercial flavored syrups	~250–320 kcal/100 ml (typical — label is final)	Sugar content varies by brand — the label is the final word
Honey	~304 kcal/100 g — still added sugar	Never for children under 1 year (infant-botulism rule)
Tonic water	~30–35 kcal/100 ml — sugar + quinine	Counts toward the sugar line — it is not a zero mixer
Diet swaps (sucralose / stevia)	~0 kcal	Concentrated sweetness — dosing differs completely from sugar; possible bitter aftertaste

Cleaning-chemical safety

Chemical	What it's for	Safety protocol
Backflush powder / espresso detergent	Dissolves coffee oils and residue in the group head via blind-filter backflush cycles	Follow with full water-only rinse cycles; pull one coffee shot and discard it before returning to service
Descaler	Removes limescale from boilers and water paths, on the water-hardness schedule	Gloves + ventilation; never mix with other chemicals; complete every rinse cycle the manufacturer specifies
Food-safe sanitizer	Sanitizes food-contact surfaces, pitchers, and tools	Dose exactly per label, respect the stated contact time, then air-dry — no towel wipe
Grinder cleaning tablets	Purge oils and stale residue from the burrs without disassembly	Run a small batch of coffee through afterwards and discard it before grinding for service
HARD RULE — all cleaning chemicals	Chemical-hazard separation (HACCP)	Store fully separate from food and packaging, clearly labeled, and never decant into drink bottles or food containers