- Ingredients for crumb topping:
- ⅓ cup brown sugar
- ⅓ cup granulated sugar
- 1 cup all-purpose flour
- ½ cup chopped walnuts
- 1 teaspoon cinnamon
- ½ teaspoon cloves
- ¼ teaspoon salt, if using unsalted butter
- 5 tablespoons butter, melted
Ingredients for muffins:
- 1 2/3 cups all-purpose flour
- 1 1/2 teaspoon baking powder
- 1/2 teaspoon baking soda
- ½ teaspoon salt
- 1 teaspoon ground cinnamon
- 1 cup granulated sugar
- Zest of 3 clementines, 1/3 cup clementine juice
- ½ cup unsalted butter, browned
- 1 large egg
- ½ cup buttermilk
- 1 teaspoon pure vanilla extract
**If you do not have buttermilk: Combine 1 Tbsp of white vinegar with 1 cup milk in a bowl and set aside for 5–10 minutes to “sour”. Use this substitute as you would buttermilk in this recipe.
- 2 cups powdered sugar
- 1/3 cup clementine juice
- Place a rack in the upper third of the oven and preheat oven to 350 degrees F. Line 12 muffin cups with paper liners or spray with non-stick cooking spray. Set aside.
- For the crumb topping, combine sugars, flour, spices and salt in a medium size bowl. Incorporate the dry ingredients and then slowly drizzle in melted butter while stirring with a fork. Keep stirring after all butter is added until the mixture gets crumbly and is able to be packed between your fingers.
- For the muffins, in a medium bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and sugar. Set aside.
- Brown your butter: In a small saucepan over medium-low heat, melt butter. Butter will begin to crackle and pop as it melts. Once the water has evaporated the butter will quiet down and begin to brown. Keep an eye on it as it browns quickly. The butter will begin to smell nutty. Remove from heat and immediately and set aside to cool.
- In a small bowl whisk together egg, buttermilk, and vanilla extract. Add cooled browned butter and whisk until incorporated.
- In the bowl of your stand mixer, add the wet ingredients all at once to the dry ingredients. Stir together until no flour bits remain and all of the ingredients are well combined being sure not to overmix batter.
- Divide mixture between the 12 prepared muffin cups. Place a heaping tablespoon of the crumbs on top of each muffin, dividing the crumbs equally and mounding them up slightly in the center. Don’t be afraid to pile it on because the muffins will expand quite a bit.
- Place tray in oven and bake for 25 minutes or until a tester inserted in the center comes out clean.
- Remove from oven and allow to cool in pan for about 10 minutes then remove to a wire rack to finish cooling. While the muffins cool, make the glaze.
- To make the glaze, combine confectioners’ sugar and clementine juice. Whisk until smooth. If the glaze is too thin, add more confectioners’ sugar as needed. Drizzle cooled muffins with the glaze. Glaze will set within 10 minutes. Muffins can be kept up to 5 days in an air-tight container.
- Prep Time: 45 mins