01 -
Place half of the apple slices, 7 grams butter, 13 grams brown sugar, and 0.25 teaspoon apple pie spice into a microwave-safe mug. Microwave for 30 seconds to soften.
02 -
Melt 28 grams butter in a small bowl using the microwave. Stir in 26 grams brown sugar, milk, and vanilla extract until smooth. Incorporate flour, baking powder, and 0.25 teaspoon apple pie spice, mixing until just combined. Pour the batter over the softened apples in the mug.
03 -
Arrange remaining apple slices atop the batter. Sprinkle with 13 grams brown sugar and 0.25 teaspoon apple pie spice, then dot with the remaining 7 grams butter.
04 -
Microwave on high for 90 to 120 seconds, or until the cake is puffed and set.
05 -
Optionally, drizzle with caramel sauce and garnish with a scoop of vanilla ice cream.