These Cinnamon Coffee Cake Muffins are soft, moist, and layered with a cinnamon sugar swirl before being topped with a buttery streusel. They're an easy homemade muffin that's perfect for breakfast, brunch, or an afternoon snack.
Preheat the oven to 350°F and line a 12-cup muffin pan with paper liners.
In a large bowl, whisk together the 1 cup whole wheat flour, 1 cup all-purpose flour, 1 teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt, and 1 teaspoon ground cinnamon.
In a separate bowl, whisk together the 2 large eggs, ¾ cup plain Greek yogurt, ⅓ cup honey , ¼ cup avocado oil, 1 teaspoon vanilla extract, and ½ cup milk of choice.
Add the wet ingredients to the dry ingredients and mix until just combined.
In a small bowl, stir together the ¼ cup light brown sugar and 1 tablespoon ground cinnamon for the swirl.
Prepare the streusel by mixing the ⅓ cup whole wheat flour, 2 tablespoons brown sugar, 1 teaspoon cinnamon, and 2 tablespoons melted butter or coconut oil until crumbly.
Fill each muffin cup about one-third full with batter. Sprinkle about 1 teaspoon of the cinnamon sugar mixture over each muffin. Add another layer of batter and top with the remaining cinnamon sugar mixture. Gently swirl with a toothpick or skewer.
Sprinkle the streusel evenly over the tops of each muffin.
Bake for 18 to 22 minutes, or until a toothpick inserted into the center comes out clean.
Let the muffins cool completely.
Whisk together the ½ cup powdered sugar, 1 to 2 tablespoons milk, and ½ teaspoon vanilla extract until smooth. Drizzle over the cooled muffins before serving.
Notes
Don't overmix the batter. Stir just until the dry ingredients are incorporated to keep the muffins light and tender.
For the best streusel texture, mix just until crumbly rather than into a smooth dough.
Gently press the streusel onto each muffin before baking, so it stays in place.
Allow the muffins to cool completely before adding the glaze.
Store leftovers in an airtight container for up to 3 days at room temperature or freeze for up to 3 months.