Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 12 cup muffin tin.
In a large bowl, cream together the butter and sugar until light and fluffy. Beat in the eggs one at a time, then stir in the vanilla.
Combine the flour, baking powder and salt; stir into the creamed mixture alternately with the milk and strawberry puree. Fill the muffin tin 3/4 full.
Bake for 20 to 25 minutes, or until a toothpick inserted into the center of a cupcake comes out clean. Cool cupcakes in the tin for 10 minutes then remove from the tin and cool completely on a wire rack.
Frost the cooled cupcakes with the buttercream frosting.
Interesting Facts
Strawberry puree is a great way to add flavor and moisture to cupcakes.
Adding vanilla extract to the batter enhances the flavor of the cupcakes.
Strawberry cupcakes can be decorated with fresh strawberries or strawberry icing for a special touch.