- 3/4 cup all-purpose flour
- 1 tablespoon all-purpose flour
- 1/3 cup cake flour
- 1 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup brown sugar
- 1/2 cup butter, softened
- 1 egg, beaten
- 1 tablespoon vanilla
- 3/4 cup chopped strawberries
- 1/2 cup miniature marshmallows
- 2 tablespoons miniature marshmallows, or to taste
- Preheat oven to 350 degrees F (175 degrees C). Grease a 9-inch square baking dish.
- Sift all-purpose flour, cake flour, baking powder, and salt together into a bowl.
- Beat brown sugar and butter together with an electric mixer in a large bowl until smooth. Beat egg and vanilla extract into the creamy sugar mixture until smooth. Add the flour mixture and stir until just incorporated. Stir strawberries and 1/2 cup marshmallows into the batter; pour into the prepared dish. Sprinkle 2 tablespoons miniature marshmallows atop the batter.
- Bake in preheated oven until set in the center, about 25 minutes.