These soft and fluffy Strawberry Rhubarb Muffinswith Streusel Topping are filled with juicy strawberries and rhubarb and topped with buttery cinnamon streusel.
Preheat the oven to 350℉. Line muffin tins with 15 parchment muffin liners or grease.
Whisk together the melted butter, white sugar, and brown sugar. Add the vanilla, eggs, and buttermilk and whisk until smooth.
Add the flour, baking powder, salt, rhubarb, and strawberries and mix just until combined. Do not overmix!
Fill each liner to the top with batter. Stir together the melted butter, flour, brown sugar, and cinnamon and crumble on top of the batter in each liner. Bake in the preheated oven for 18-20 minutes or until a toothpick inserted into the center comes out clean. Let cool in the pans for 5 minutes before transferring to a wire rack to finish cooling. Enjoy!
Notes
If using unsalted butter, add ¼ teaspoon of salt to the batter and ⅛ teaspoon to the streusel.
Store for up to 4 days at room temperature in an airtight container with a layer of paper towel on the bottom to absorb excess moisture. Or freeze in an airtight container for up to 2 months for best freshness.