1-First, preheat your oven to 425°F (218°C) and prepare a muffin pan with nonstick spray or liners, just like in the directions we’ve outlined. This high initial temperature helps create those tall, domed tops that make muffins so appealing.

2-Next, if you’re using the crumb topping, mix brown sugar, granulated sugar, cinnamon, melted butter, and flour until large crumbles form, then set it aside. In a separate bowl, whisk together the dry ingredients: flour, baking powder, baking soda, salt, and optional cinnamon to ensure even distribution.

3-Using a mixer, beat the unsalted butter with sugars until smooth and creamy, then add sour cream or yogurt, eggs, and vanilla extract; mix until fully combined. Gradually add the dry ingredients to the wet mixture and beat on low speed until nearly combined, then stir in the milk. Fold in your chosen add-ins like chocolate chips or berries to keep the batter thick and flavorful.

4-Spoon the batter into muffin cups, filling them all the way to the top for that perfect rise. Sprinkle on coarse sugar or the crumb topping for extra crunch. Bake at 425°F for 5 minutes, then reduce to 350°F and continue for 15 to 18 minutes, or until a toothpick comes out clean. After baking, let the muffins cool in the pan for 10 minutes before moving them to a rack.