<http://schema.org/recipeInstructions>
" Preheat oven to 350 degrees F. Line a 12-cup muffin pan with paper liners. Add unsweetened cocoa powder to flour before sifting. In a small bowl, sift flour, baking powder, baking soda, and salt. In a large bowl, beat butter until creamy. Gradually beat in granulated sugar; beat 2 minutes until fluffy. Beat in eggs one at a time until well blended; beat in vanilla. Beat in flour mixture, alternating with buttermilk, just until smooth. Divide batter evenly among muffin cups. Bake 18 to 20 minutes or until tops spring back when lightly pressed. Let cool. Top with frosting. To make Lemon Cupcakes: Prepare Yellow Cupcakes, omitting vanilla. Add 2 teaspoons grated lemon zest and 1/4 teaspoon lemon extract. To make Red Velvet Cupcakes: Prepare Yellow Cupcakes, adding 2 tablespoons unsweetened cocoa powder to flour mixture before sifting. Stir 1 tablespoon red food coloring and 1 teaspoon vinegar into buttermilk."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.delish.com/cooking/recipe-ideas/recipes/a27717/yellow-cupcakes-4079/>