Gooey Chocolate S’mores Cupcakes

INGREDIENTS

Hershey's Bars (3oz of chocolate)

8 tbsp

unsalted butter

1/4 cup

graham cracker crumbs ((2 1/2) graham crackers)

1/4 cup

all-purpose flour

2 tbsp

brown sugar

3 tbsp

melted butter

4 tbsp

unsalted butter

1/4 cup

semi-sweet chocolate (chopped (high-quality chips are fine))

1 tbsp

vegetable oil

1/2 cup

all-purpose flour

1/4 cup

unsweetened cocoa powder (sifted)

1/2 tsp

baking powder

1/4 tsp

baking soda

1/4 tsp

salt

1/2 cup

granulated sugar

large egg and 1 large egg yolk (at room temperature)

1/2 tsp

vanilla extract

1/4 cup

buttermilk

1/4 cup

hot coffee or hot water

5 cups

marshmallow frosting (see recipe for when to start the frosting)