Butter Sugar Eggs Lemon Zest All Purpose Flour
Begin by preheating the oven to 400°F. Line a muffin tin with liners, parchment paper, or grease them really well. Set this aside. Grab a large mixing bowl and add flour, baking powder, baking soda, cornstarch, and salt.
In a separate large mixing bowl, add the softened butter and granulated sugar. Beat that together using an electric hand or stand mixer. Add the eggs one at a time and continue to beat it together, scraping the sides of the bowl in between each addition.