Funfetti Birthday Cake Oreo Cupcakes

INGREDIENTS

1 1/4 cups

all-purpose flour

1 1/2 tsp

baking powder

1/4 tsp

salt

3/4 cup

sugar

6 tbsp

(3/4 stick, 85 grams) unsalted butter, at room temperature

whole egg plus 1 egg white, at room temperature

1 tsp

vanilla extract

1/2 cup

milk

1/4 cup

rainbow sprinkles or quins

birthday cake oreos, coarsely chopped

1 1/2 cups

(3 sticks, 339 grams) unsalted butter, at room temperature

3 1/2 cups

powdered sugar

2 tsp

pure vanilla extract

salt

Additional cookies and sprinkles or quins for decoration