INGREDIENTS VANILLA CUPCAKES 6 tbsp (84g), unsalted butter, room temperature (I use Challenge Butter) 3/4 cups (155g) sugar 6 tbsp (86g) sour cream, room temperature 2 tsp (10ml) vanilla extract 3 large egg whites, room temperature 1 1/4 cups (163g) all purpose flour 2 tsp (8g) baking powder ¼ tsp salt 6 tbsp (90ml) milk, room temperature 2 tbsp (30ml) water, room temperature PASTRY CREAM FILLING 2 egg yolks 6 tbsp (78g) sugar 1 1/2 tbsp cornstarch 1 cup + 2 tbsp (270ml) milk 1 tbsp (14g) salted butter 1 tsp vanilla extract CHOCOLATE GANACHE 12 oz (338g) semi sweet chocolate chips 2 tbsp (30ml) light corn syrup 3/4 cup + 2 tbsp (210ml) heavy whipping cream INSTRUCTIONS 1. Preheat oven to 350°F (176°C) and prepare a cupcake pan with cupcake liners. 2. In a large mixing bowl, cream butter and sugar together until light in color and fluffy, about 3-4 minutes. Do not skimp on the amount of creaming time. 3. Add sour cream and vanilla extract an...