Name: Chocolate Vanilla Sandwich Biscuits
Prep time: 30 min
Cook time: 8 min
Yield: 24
Cuisine: American
Ingredients: 1/2 cup + 2 tbsp unsalted butter at room temperature; 1/2 cup sugar; 1 large egg yolk; 1 tsp vanilla extract; 1 1/4 cups plain flour; 1/4 cup cocoa powder; 1/4 tsp baking powder; 1/4 tsp salt; 6oz fondant icing