Caramel Filled Cupcakes with Whipped Caramel Frosting

Ingredients

• 1 yellow cake mix (I prefer Pillsbury)
• 3 whole eggs
• 1/2 cup water
• 1/3 cup oil
• 1 cup sour cream (8 ounces)
• 1 small box instant vanilla pudding
• 1 stick butter, melted
• 1 cup packed light brown
• sugar
• 1/4 cup milk
• 1 teaspoon pure vanilla extract
• 2 sticks butter
• 1 cup packed dark brown sugar
• 1/3 cup heavy cream, or more if needed
• 16 oz. confectioners’ sugar (~ 4 cups)