Fat Washing & Infusion Techniques

Fat Washing & Infusion Techniques

Fat washing and infusion are two core techniques professional bartenders use to explore flavor boundaries. They create unique flavors you can't buy in stores.

I. Fat Washing

**Principle**: Flavor compounds in fats (butter, coconut oil, olive oil, bacon fat etc.) are fat-soluble. Mix fat with spirits, flavors transfer from fat to alcohol, then freeze to separate solid fat.

**Classic Examples**:

• Brown Butter Whiskey: Warm, creamy, toffee-like
• Coconut Oil Rum: Tropical, silky, coconut aroma
• Bacon Bourbon: Smoky, savory, complex
• Olive Oil Gin: Herbal, fruity, Mediterranean

**Standard Steps**:

1. Melt fat to liquid (if solid)
2. Mix fat with spirit at 1:4 to 1:8 ratio
3. Seal container, rest at room temperature 4-24 hours (longer = more flavor)
4. Shake every few hours
5. Freeze for at least 12 hours (fat solidifies on surface)
6. Scoop off the solidified fat layer
7. Filter remaining particles through coffee filters
8. Bottle and store

**Notes**:

• Use unsalted butter (avoid saltiness)
• Bacon needs to be cooked crisp before using the fat
• Fat-washed spirits have shorter shelf life (2-4 weeks refrigerated)
• Start with small batches to test ratios

II. Infusion

**Principle**: Steep flavor materials in spirits, letting alcohol extract flavor compounds. Alcohol is an excellent solvent, extracting flavors water cannot.

**Infusion Material Categories**:

*Fruits*

• Berries (strawberry, blueberry, raspberry): 24-48 hours
• Citrus peel (orange, lemon, grapefruit): 24-72 hours
• Tropical fruits (pineapple, mango, passion fruit): 24-48 hours

*Herbs & Spices*

• Mint, basil, rosemary: 4-12 hours (too long becomes bitter)
• Vanilla bean: 1-2 weeks
• Cinnamon sticks, cloves, star anise: 3-7 days
• Coffee beans: 24-48 hours
• Chili peppers: 2-12 hours (adjust by heat level)

*Nuts & Seeds*

• Almonds, walnuts: 1-2 weeks
• Cocoa beans: 1-2 weeks
• Sesame seeds: 3-5 days

**Standard Steps**:

1. Prepare materials: wash, chop, toast (if needed)
2. Place in sealed glass jar
3. Pour in spirit, fully covering materials
4. Seal, store in cool dark place
5. Shake daily
6. Taste regularly, filter when ideal flavor is reached
7. Filter through coffee filters or fine cheesecloth
8. Bottle and store

**Quick Infusion (Sous Vide)**:

Using a sous vide cooker dramatically reduces infusion time:

• Temperature: 50-60°C
• Time: 2-4 hours (equivalent to 1-2 weeks traditional method)
• Vacuum seal materials then place in water bath

III. Advanced Applications

**Double Infusion**: Infuse one material first, filter, then infuse another for complex layers

**Comparative Infusion**: Same material infused in different base spirits to compare flavor differences

**Infusion Blending**: Mix multiple infused liquids in ratios to create unique recipes