Preheat the oven to 350 degrees. Place cupcake liners in a muffin pan.
Mix the dry ingredients for the cupcakes in a small bowl. Set aside.
Mix the wet ingredients for the cupcakes with an electric mixer. Add the dry ingredients and mix until combined.
Fill the cupcake liners 2/3 full. For full-sized cupcakes, bake for 18 to 20 minutes or until a toothpick inserted in the center comes out clean. For mini-cupcakes, bake for 10-15 minutes or until a toothpick comes out clean. Cool the cupcakes on a wire rack.
While the cupcakes are cooling, puree the strawberries in a food processor or blender. This will generate about 1/3 cup of strawberry puree.
Using an electric mixer, combine all three frosting ingredients to form a smooth frosting. If it seems a bit too wet, add a little more powdered sugar until the desired consistency is reached. Frost the cupcakes when they're completely cool.