Ingredients
Method
Prep & Mix Batter
- Prep Pan & Oven: Preheat oven to 425°F (218°C). Line a 12-count standard muffin tin with parchment paper muffin liners.
- Whisk Dry Ingredients: In a large bowl, whisk together flour, baking powder, baking soda, ground cinnamon, nutmeg, and sea salt.
- Whisk Wet Ingredients: In a separate medium bowl, whisk melted butter, granulated sugar, brown sugar, eggs, sour cream, milk, and vanilla extract until completely smooth and emulsified.
- Combine & Fold Apples: Pour wet ingredients into dry ingredients. Fold gently with a rubber spatula just until combined (do not overmix). Gently fold in the finely diced apples.
Make Streusel & High-Heat Bakery Bake
- Make Streusel: In a small bowl, fork together flour, brown sugar, cinnamon, and cold cubed butter until coarse, crumbly pea-sized clusters form.
- Fill Muffin Cups: Divide the thick batter evenly among the 12 muffin cups, filling them all the way to the top. Generously heap the cinnamon streusel over each muffin, pressing down lightly so it adheres.
- Bakery Bake Technique: Bake at 425°F (218°C) for 5 minutes to trigger a rapid rise for sky-high muffin tops. Then, without opening the oven door, lower the temperature to 350°F (175°C) and bake for an additional 15 to 17 minutes until a toothpick inserted in the center comes out clean.
- Glaze & Enjoy: Cool in pan for 5 minutes, then transfer to a wire cooling rack. Whisk powdered sugar and milk together, drizzle over warm muffins, and enjoy!
Nutrition
Notes
Finely dice apples into ¼-inch pieces so they cook tenderly without sinking to the bottom. Starting baking at 425°F creates tall, professional domed bakery muffin tops.
