Vanilla Bean Rice Krispie Treat Cupcakes

INGREDIENTS

For the cupcakes:

8 oz

unsalted butter, at room temperature

1 tbsp

baking powder

2 1/2 cups

granulated sugar

3/4 tsp

salt

2 tsp

vanilla bean paste

vanilla bean, seed scraped out and pod discarded

large egg whites

2 3/4 cups

cake flour

1 cup

whole milk, room temperature

1 cup

Rice Krispie Cereal

For the frosting:

8 oz

unsalted butter

2 cups

powdered sugar

2 tsp

vanilla bean paste

13 oz

marshmallow crème

Rice Krispie Treat pieces for garnish (I just about a box and cut them up but feel free to make your own)