Mint Chocolate Chip Cupcakes


Ingredients
1/3 cup cocoa powder
1/2 tsp baking soda
1/2 cup boiling water
1/4 cup butter, melted
2 1/2 Tbsp vegetable or canola oil
3/4 cup + 2 Tbsp granulated sugar
3/4 tsp vanilla extract
1/4 tsp salt
1 large egg
1 large egg yolk
1/4 cup heavy cream
3/4 cup + 2 Tbsp all-purpose flour
Preparation method