Microwave Peanut Butter Chocolate Chip Mug Cookie
A single-serving peanut butter and chocolate chip cookie baked directly in a mug in the microwave, ready in under five minutes. This indulgent dessert combines creamy peanut butter, brown sugar, and semi-sweet chocolate chips in a warm, cake-like texture that's perfect for satisfying sudden cravings. The magic happens when you let it cool slightly, allowing the cookie to set while staying fudgy inside. Ideal for anyone wanting homemade dessert without heating the oven or dirtying multiple bowls. Serve warm with ice cream melting into the soft crumb for pure comfort. This version stands apart by using both brown and granulated sugar for depth, egg yolk for richness, and microwaving in the serving vessel itself, eliminating extra dishes and cooling time.
Ingredients
- 1 tablespoon butter
- 1 ½ tablespoon brown sugar
- ½ tablespoon granulated sugar
- 1 drop vanilla extract
- 1 egg yolk
- 1 tablespoon creamy peanut butter
- 2 ½ tablespoon all-purpose flourcake flour0.9reduces gluten development
lighter crumb
- 1 ½ tablespoon semi-sweet chocolate chipsdark chocolate chipssameswap
darker flavor
Instructions
- 1
Melt butter in a coffee mug in the microwave.
- 2
Add both sugars and mix until combined; mixture will be runny.
- 3
Add egg yolk, peanut butter, and vanilla extract and mix together.
- 4
Fold in flour until batter reaches cookie dough consistency, adding more flour if too thin.
- 5
Mix in chocolate chips.
- 6
Microwave for 1 minute.
- 7
Let stand for 2 minutes to continue cooking as it cools.
- 8
Top with ice cream if desired and serve with a spoon.
Tips
Use only the egg yolk for richness and better binding; the white creates excess moisture that can make the cookie cake-like rather than cookie-textured.
Watch the microwave during the final 30 seconds; microwaves vary widely, and overbaking by even 15 seconds can turn the cookie dry and rubbery.
Let it rest the full 2 minutes without opening the door. Residual heat sets the structure while keeping the center fudgy.
Good to Know
Not recommended. Eat immediately for best texture. If stored in an airtight container at room temperature, cookie hardens within 2 hours.
Mix dry ingredients in advance in a small bowl or container. At serving time, add wet ingredients and proceed. Do not prepare full batter ahead as it will thicken.
Immediately from the mug while warm. Top with vanilla ice cream or whipped cream for contrast.
Common Mistakes
Skip opening the microwave door before the 1-minute mark to avoid heat loss and uneven cooking.
Add flour incrementally if batter is too thin; excess flour toughens the cookie and makes it dense.
Use both egg yolk and whites to avoid a watery batter; yolk alone provides proper binding.
Substitutions
Dairy-Free Swaps
Gluten-Free Swaps
General Alternatives
FAQ
Can I make this without a microwave?
Yes. Transfer batter to a small oven-safe ramekin and bake at 350F for 8-10 minutes until set but still soft. Microwave allows faster results and serves in the same vessel.
What if my microwave cooks faster or slower than one minute?
Microwaves vary significantly. Start at 45 seconds, check doneness, and add 10-15 second increments until edges set but center remains soft. A toothpick inserted in the center should have moist crumbs.
Can I freeze the batter or finished cookie?
Unbaked batter can be frozen in an airtight container up to one week; thaw before microwaving. Baked cookies are best eaten fresh within 2 hours. Freezing hardens them due to small portion size.