Ingredients
Equipment
Method
Prep
- Preheat the oven to 375°F and line a muffin tin with paper liners, so the batter goes in right away.
Make streusel
- Mix all-purpose flour, brown sugar, and cinnamon, then cut in cold cubed butter until the mixture looks crumbly and clumps slightly.
Make cinnamon swirl
- Mix brown sugar and cinnamon together until evenly combined into a thick cinnamon-sugar blend.
Mix muffin batter
- Whisk all-purpose flour, baking powder, baking soda, salt, and cinnamon in a bowl to distribute the leaveners and spices evenly.
Combine wet and dry
- Beat sugar, eggs, sour cream, milk, vegetable oil, and vanilla extract in another bowl until smooth, then fold into the flour mixture until just combined.
Fill and bake
- Fill each muffin cup to about 1/3 full, add a pinch of the cinnamon swirl in the center, then fill to about 2/3 with more batter.
Top and bake
- Sprinkle streusel over each muffin, then bake at 375°F for 20–22 minutes until golden and domed.
Notes
For bakery-height muffins, keep butter for the streusel cold and avoid overmixing the batter after the wet ingredients are added. Store airtight at room temperature for up to 2 days or refrigerate up to 4 days; rewarm briefly in the microwave. Freeze baked muffins up to 2 months. For a lighter option, use low-fat sour cream and reduce vegetable oil to 1/4 cup while keeping the rest the same.
