Solo Mug Cake 0

Peanut Butter

Peanut Butter Chocolate Mug Cake

Dairy-free chocolate cake with a peanut butter middle that melts like frosting.

  • Prep 3 min
  • Cook 1m 25s
  • Total 5 min
  • Difficulty Easy
  • Dairy-Free
  • Eggless
Dairy-free peanut butter chocolate mug cake with melted chips

Steps

  1. Whisk flour, cocoa, sugar, baking powder, and salt in a mug until the cocoa is evenly colored.

  2. Add oat milk and oil. Stir from the bottom up until the batter looks like glossy pudding.

  3. Drop peanut butter into the center, cover it with a spoonful of batter, and scatter chocolate chips on top.

  4. Microwave 75-85 seconds. The cake is done when the edge is set and the center stays slightly domed.

  5. Cool one minute before digging into the peanut butter pocket.

Tips from the test kitchen

Keep the peanut butter in the center. If it touches the mug wall, it can scorch before the cake finishes.

Success guide

Make it work the first time

Expected texture

Expect a rich, slightly dense crumb with a warm peanut butter ribbon. Stop before the top looks dry because nut butter holds heat after cooking.

Success tips

  • Use a microwave-safe mug with visible headroom. If the batter fills more than about half the mug, move it to a larger mug before cooking.
  • Start with the lower end of the microwave time in the steps. Add time in short bursts only if the center still looks wet.
  • Let the cake rest before eating. The crumb keeps setting after the microwave stops, and the mug will be very hot.
  • This recipe avoids a whole egg, which helps prevent the bouncy texture people often dislike in small mug cakes.

Substitutions

Plant milk
Use the milk listed in the recipe for the most predictable texture. Thinner plant milks may need a few seconds less cooking.
Fat
Neutral oil keeps mug cakes moist. Melted butter works in some chocolate or vanilla cakes, but it can make the crumb firmer as it cools.
Flour
Do not assume a direct gluten-free flour swap unless the blend is labeled cup-for-cup; the texture may turn gummy.
Mix-ins
Keep heavy mix-ins near the center of the batter. If they touch the mug wall, they can overheat before the cake finishes.

Troubleshooting

Rubbery texture
Usually caused by overmixing, overcooking, or too much egg for one mug. Mix only until no dry flour remains and stop at the first set-top cue.
Dry crumb
The cake likely cooked too long. Next time start at the low end of the time range and let rest instead of microwaving until fully dry.
Overflow
The mug was too small or too full. Use more headroom and set the mug on a paper towel if your microwave runs hot.
Wet center
Microwave in one short burst, then rest again. A slightly glossy center is fine; a puddle of batter needs more time.

Variations

  • Add a small jam spoonful after cooking for a peanut-butter-and-jam finish.
  • Sprinkle chocolate chips on top before microwaving for a warmer dessert cup.
  • Scatter a few chips on top before cooking for a softer, glossier surface.
  • Top with coconut yogurt or dairy-free ice cream after resting.