Lemon Buttermilk Cupcakes recipes

Name: Lemon Buttermilk Cupcakes recipes
Ingredients: 1 1/2 cups all-purpose flour; 3 tablespoons cornmeal (preferably coarse ground); 1 teaspoon baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon kosher salt; 3/4 cup granulated sugar; 1/2 cup (1 stick) unsalted butter, room temperature; 2 eggs plus 1 egg yolk, room temperature*; 1 lemon, zested and juiced (should yield 1 teaspoon finely grated lemon zest and 2 tablespoons lemon juice); 1 teaspoon vanilla extract; 1/2 cup buttermilk; 3/4 cup powdered sugar, sifted; 2 tablespoons lemon juice (from 1 lemon); food colouring