Heat oven to 375 degrees. Line a cupcake pan with cupcake liners or grease & flower each cupcake cup. Sift together flour, cocoa, sugar, soda and salt.
Add buttermilk, vanilla extract, butter flavor extract and buttermilk. Stir once around the bowl to incorporate.
Using a mixer on low speed, beat batter for 30 seconds. Scrape the bowl. Beat again at medium speed for 2 minutes. Add egg and beat for 1 additional minute at medium speed.
Pour batter into prepared cupcake cups. Bake 15-20 minutes until center is set but not firm. Remove and let cool on a wire rack. Frost once completely cooled. Cupcakes can be refrigerated prior to frosting.
Peppermint Frosting
Prepare French Buttercream Frosting as directed, except swap out the almond extract for peppermint extract. Spread Peppermint Frosting on each cupcake. Top with crushed peppermint candies.
Notes
Adapted from McCall's Cook Book 1963 Click here for French Buttercream Frosting recipe.