Chocolate Cupcakes with Salted Caramel Chocolate Buttercream

INGREDIENTS

Eggs, large

1/2 cup

Caramel sauce, salted

3/4 cup

All purpose flour

1/2 tsp

Baking powder

1/2 cup

Brown sugar, light packed

3/4 cup

Cocoa, unsweetened

2 tsp

Fleur de sel

1 1/2 cups

Granulated sugar

2 cups

Powdered sugar

1/4 tsp

Salt

1/2 cup

Semi-sweet chocolate

1 tsp

Vanilla extract, pure

1/2 tsp

Espresso, instant powder

2 1/2 sticks

Butter, unsalted

2 tbsp

Butter, unsalted

1/2 cup

Greek yogurt or sour cream, plain

3/4 cup

Heavy cream

1/2 tsp

Milk

1 tbsp

Water