Fun Childrens “CupcakesMuffins”

Name: Fun Children’s “Cupcakes/Muffins”
Ingredients: Vanilla Buttercream; 4 ounces butter, room temperature; 4 cups icing sugar; 1/4 cup milk; 1 teaspoon vanilla extract; Cupcakes/Muffins; 1 3/4 cups all purpose flour; 2 teaspoons baking powder; 1/2 teaspoon salt; 2/3 cup sugar; 2 large eggs beaten; 4 ounces unsalted butter (1 stick butter); 1/2 lemon - juice; 1 cup milk