Ingredients
Equipment
Method
Preheat and prep
- Preheat oven to 400°F and line a 12-cup muffin tin with paper liners.
Mix dry ingredients
- Whisk together flour, sugar, baking powder, and salt in a large bowl until evenly combined.
Mix wet ingredients
- Beat egg, milk, oil, and vanilla until combined in a separate bowl.
Combine batter
- Pour wet ingredients into dry ingredients and stir until just moistened.
Add rhubarb
- Gently fold in diced rhubarb so pink pieces stay visible.
Fill and top
- Divide batter among muffin cups, filling each about 2/3 full, then sprinkle with cinnamon sugar.
Bake
- Bake for 18-20 minutes at 400°F until golden and a toothpick comes out clean.
Cool
- Cool in pan for 5 minutes before transferring to a wire rack.
Notes
For best texture, stop stirring as soon as the batter is just moistened so the muffins stay tender. Store in an airtight container at room temperature for up to 2 days or in the refrigerator for up to 4 days; freeze up to 2 months. For a dairy-light option, use lactose-free milk or unsweetened oat milk in place of milk.
