Chocolate Cupcakes with Chocolate Buttercream Frosting

INGREDIENTS

1/4 cup

+ 2 Tbsp ((38g) unsweetened cocoa powder)

1/2 tsp

baking soda

1/2 cup

boiling water

1/4 cup

unsalted butter, melted

3 tbsp

vegetable oil

1 cup

granulated sugar

1 tsp

vanilla extract

Heaping 1/4 tsp salt

large egg

large egg yolk

1/4 cup

heavy cream

3/4 cup

+ 2 Tbsp ((125g) all-purpose flour)

3/4 cup

butter, softened (preferably 1/2 cup unsalted butter 1/4 cup salted)

2 1/2 cups

powdered sugar

6 tbsp

unsweetened cocoa powder*

2 tbsp

heavy cream

1 tsp

vanilla extract