3 Ingredient Peanut Butter Mug Cake
3 Ingredient Peanut Butter Mug Cake is a easy American recipe that serves 1. 440 calories per serving. Recipe by Sam Does Her Best on YouTube.
Prep: 1 min | Cook: 1 min | Total: 4 min
Cost: $0.55 total, $0.55 per serving
Ingredients
- 3 tablespoons Peanut Butter (creamy, natural peanut butter)
- 2 tablespoons Granulated Sugar (white granulated sugar)
- 1 Large Egg (room temperature)
Instructions
Prepare Mug
Select a microwave‑safe mug (about 12‑oz capacity) and ensure it is clean and dry.
Time: PT30S
Add Peanut Butter and Sugar
Spoon 3 tablespoons of peanut butter and 2 tablespoons of sugar into the mug.
Time: PT30S
Whisk in the Egg
Crack the egg into the mug and whisk with a fork or small whisk until the mixture is smooth and no lumps remain.
Time: PT30S
Microwave the Cake
Place the mug in the microwave and cook on high for 1 minute. Do not overcook; the cake should be set but still slightly soft in the center.
Time: PT1M
Cool Slightly and Serve
Allow the mug cake to sit for about 1 minute (it will continue cooking slightly). Then enjoy straight from the mug or turn out onto a plate.
Time: PT1M
Nutrition Facts
- Calories
- 440
- Protein
- 12 g
- Carbohydrates
- 30 g
- Fat
- 28 g
- Fiber
- 3 g
Dietary info: Gluten‑Free, Dairy‑Free, Vegetarian
Allergens: Peanuts, Egg
Last updated: April 20, 2026






