Bulletproof Coffee Recipe (BEST Ingredients for Keto and Intermittent Fasting)

Bulletproof Coffee Recipe (BEST Ingredients for Keto and Intermittent Fasting) is a easy American recipe that serves 1. 270 calories per serving. Recipe by Kait Malthaner (BSc Nutrition & Exercise) on YouTube.

Prep: 8 min | Cook: 5 min | Total: 20 min

Cost: $1.70 total, $1.70 per serving

Ingredients

  • 8 oz Brewed Coffee (freshly brewed hot coffee, 90-96°C)
  • 1 tablespoon Unsalted Grass‑Fed Butter (cut into cubes, room temperature)
  • 1 tablespoon MCT Oil (pure MCT oil, preferably from coconut)
  • 1 large Egg Yolk (room temperature, fresh)

Instructions

  1. Brew Coffee

    Pull one to two shots of espresso (about 2 oz) and top with hot water to make 8 oz of coffee, or brew a strong cup using a drip machine.

    Time: PT5M

    Temperature: 90-96°C

  2. Gather and Measure Ingredients

    While the coffee brews, measure 1 Tbsp butter, 1 Tbsp MCT oil, and separate one large egg yolk into a small bowl.

    Time: PT2M

  3. Blend Coffee and Fats

    Add the hot coffee to the blender, then add butter, MCT oil, and the egg yolk. Secure the lid and blend on high for 20‑30 seconds until frothy and fully emulsified.

    Time: PT1M

  4. Serve Immediately

    Pour the frothy coffee into a mug and enjoy while hot.

    Time: PT30S

Nutrition Facts

Calories
270
Protein
5 g
Carbohydrates
1 g
Fat
28 g
Fiber
0 g

Dietary info: Keto, Low‑Carb, Gluten‑Free, Paleo (if using ghee or coconut oil), Dairy‑Free (use ghee or coconut oil instead of butter)

Allergens: Dairy (butter), Egg, Coconut (MCT oil source)

Last updated: April 15, 2026

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Bulletproof Coffee Recipe (BEST Ingredients for Keto and Intermittent Fasting)

Recipe by Kait Malthaner (BSc Nutrition & Exercise)

A high‑fat, low‑carb coffee drink that replaces breakfast for keto or intermittent‑fasting lifestyles. Blend hot coffee with butter, MCT oil, and an egg yolk for a creamy, frothy beverage that supports fat burning, cognitive function, and satiety.

EasyAmericanServes 1

Shop all ingredients on Amazon in one click • Printable PDF with shopping checklist

Source Video
8m
Prep
0m
Cook
10m
Cleanup
18m
Total

Cost Breakdown

$1.70
Total cost
$1.70
Per serving

Critical Success Points

  • Blend hot coffee with butter, MCT oil, and egg yolk to create a stable emulsion.
  • Use a glass‑jar blender or ensure the plastic blender is rated for hot liquids.
  • Keep butter and egg yolk at room temperature to prevent curdling.

Safety Warnings

  • Hot liquid can cause burns – handle the coffee and blender with care.
  • Ensure the blender lid is tightly sealed before blending.
  • If using a plastic blender, verify it is rated for hot liquids; otherwise use a glass‑jar blender.
  • Raw egg yolk carries a small risk of salmonella – use pasteurized eggs if concerned.

Frequently Asked Questions

Everything you need to know about this recipe

Q

What is the cultural significance and history of Bulletproof Coffee in the keto and intermittent fasting community?

A

Bulletproof Coffee was popularized in the early 2010s by Dave Asprey as a high‑fat, low‑carb beverage that mimics the metabolic benefits of fasting while providing energy. It quickly became a staple among keto enthusiasts and intermittent fasters because it keeps insulin low and curbs morning cravings.

cultural
Q

How does Bulletproof Coffee fit into the broader keto cuisine tradition?

A

Keto cuisine emphasizes high fat, moderate protein, and very low carbs. Bulletproof Coffee delivers a concentrated dose of healthy fats in liquid form, making it an easy breakfast replacement that aligns perfectly with keto macros and supports ketosis.

cultural
Q

What are the authentic traditional ingredients for Bulletproof Coffee versus acceptable substitutes?

A

The classic recipe uses freshly brewed coffee, unsalted grass‑fed butter (or ghee), and MCT oil. Acceptable substitutes include coconut oil for MCT oil, ghee for butter, and an optional egg yolk for extra creaminess. Collagen powder or cacao butter can be added for additional nutrients.

cultural
Q

What occasions or celebrations is Bulletproof Coffee traditionally associated with in the keto lifestyle?

A

Bulletproof Coffee is most commonly consumed as a morning ritual to replace breakfast, especially on days when keto followers are fasting or need a quick, portable energy boost before workouts or work meetings.

cultural
Q

What other keto‑friendly foods pair well with Bulletproof Coffee?

A

Pair it with a handful of macadamia nuts, avocado toast made with low‑carb bread, or a small serving of full‑fat Greek yogurt for a balanced keto breakfast after the coffee.

cultural
Q

What are the most common mistakes to avoid when making Bulletproof Coffee at home?

A

Common errors include using cold coffee (which prevents emulsification), over‑blending which can over‑heat the blender motor, and using a plastic blender not rated for hot liquids, which can melt or leach chemicals.

technical
Q

Why does this Bulletproof Coffee recipe use an egg yolk instead of just butter and MCT oil?

A

The egg yolk adds extra emulsifying lecithin, creating a richer, frothier texture and providing additional fat‑soluble vitamins (A, D, E, K). It also contributes a small amount of protein without significantly raising insulin.

technical
Q

Can I make Bulletproof Coffee ahead of time and how should I store it?

A

Yes, you can blend the coffee and fats ahead and store it in a sealed container in the refrigerator for up to 24 hours. Reheat gently on the stove or in a microwave and give it a quick blend before drinking to restore the froth.

technical
Q

What does the YouTube channel Kait Malthaner (BSc Nutrition & Exercise) specialize in?

A

Kait Malthaner’s channel focuses on evidence‑based nutrition, low‑carb and keto eating, exercise science, and practical lifestyle tips for health optimization, with a strong emphasis on nutrient density and sustainable habits.

channel
Q

How does the YouTube channel Kait Malthaner (BSc Nutrition & Exercise) approach keto cooking differently from other keto channels?

A

Kait combines her academic background in nutrition and exercise science to provide scientifically grounded explanations for each ingredient, often highlighting metabolic effects, while many other keto channels focus more on trends without deep nutritional analysis.

channel

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