Ingredients
Equipment
Method
- Position an oven rack in the center of the oven and preheat to 425 F. Line a 12-cup muffin tin with paper liners.
- Make the streusel first. In a small bowl, whisk together the 1/2 cup flour, 1/3 cup brown sugar, and 1 teaspoon cinnamon. Add the 4 tablespoons cold cubed butter and rub it in with your fingertips until the mixture looks like coarse, clumpy sand. Refrigerate while you mix the batter.
- Peel and dice the peaches into 1/2-inch pieces. Pat them dry with paper towels, then toss with 1 tablespoon of the all-purpose flour and set aside.
- In a medium bowl, whisk together the remaining 2 cups flour, baking powder, baking soda, salt, 1.5 teaspoons cinnamon, and nutmeg until evenly combined.
- In a large bowl, beat the softened butter, granulated sugar, and 1/2 cup brown sugar with an electric mixer on medium-high for 2 to 3 minutes, until pale and fluffy.
- Add the eggs one at a time, beating well after each. Scrape down the bowl, then beat in the sour cream and vanilla until smooth.
- Add the dry ingredients to the wet in two additions, folding gently with a rubber spatula just until no dry streaks remain. Do not overmix or the muffins will turn tough.
- Fold in the floured peaches with 3 or 4 gentle strokes, distributing them evenly through the batter.
- Divide the batter among the 12 liners, filling each nearly to the top. Spoon the chilled streusel generously over each muffin, pressing lightly so it adheres.
- Bake at 425 F for 5 minutes to jump-start the domed tops. Without opening the oven, lower the temperature to 350 F and bake for another 15 to 18 minutes, until the tops are golden brown and a toothpick inserted in the center comes out with only moist crumbs.
- Cool the muffins in the tin for 5 minutes, then transfer to a wire rack. Serve warm or at room temperature.
