Photo of Peanut butter, chocolate, and caramel mug cake by WW

Peanut butter, chocolate, and caramel mug cake

Total Time
10 min
9 min
1 min
When your sweet tooth is calling, but you don’t want to make a full-scale dessert, go for a single-serving mug cake. This one, made with powdered peanut butter, cocoa powder, and egg white, cooks in just one minute (or less) to an airy, souffle-like texture. As you spoon down into the warm cake, you’ll hit pockets of chewy-gooey chocolate-caramel bar. Though you might be tempted to mix together the batter in the mug you’ll use for cooking, we recommend whisking in a separate bowl for the best results.


Cooking spray

2 spray(s)

Vanilla extract

¼ tsp(s)

Egg whites

1 egg white(s)

Powdered peanut butter

2 tbsp(s)

Unsweetened cocoa powder

1 tbsp(s)


1 tsp(s)

Baking powder

¼ tsp(s)

WW Chocolate caramel flavoured snack bar

1 bar(s), chopped


  1. In a small bowl, whisk together 1½ tbsp water, vanilla, and egg white. Add the powdered peanut butter, cocoa powder, sugar, and baking powder; whisk until smooth. Stir in half of the snack bar pieces.
  2. Coat a 1½-cup capacity, microwave-safe mug or ramekin with cooking spray. Scrape the batter into the mug; top with the remaining snack bar pieces. Microwave on High until puffy and set, 45 seconds to 1 minute. Serve warm.
  3. Serving size: 1 mug cake