Preheat oven to 350 degrees fahrenheit and grease an 8 inch cake pan. Line the bottom of the pan with a round of parchment paper to prevent cake from sticking.
To make the streusel, combine flour, brown sugar, melted butter, cinnamon, nutmeg, and pecans in a medium mixing bowl. Stir until well combined then set aside.
To make the coffee cake, combine sugar and butter and mix until light and fluffy.
Add greek yogurt and milk to the sugar mixture and mix until smooth.
Add vanilla extract and large egg and mix until smooth and well incorporated.
In a separate mixing bowl, combine flour and baking powder.
Add dry ingredients to wet ingredients and mix until well combined.
Taking your prepared cake pan and pour half of the cake mixture in. Top with half of the streusel mixture and 3⁄4 cup of blueberries.
Pour the remaining cake mixture on top of the blueberry layer then sprinkle the remaining streusel and blueberries.
Bake for 30-35 minutes.
While the coffee cake is baking,make your glaze. In a mixing bowl, combine powdered sugar, cinnamon, and milk. Mix until a glaze forms.
Once your cake is finished baking, transfer it to a wire rack to finish cooling.
Put a layer of parchment paper under the rack and drizzle the cinnamon glaze on top of the cake.
Cut into slices and enjoy!
The calories shown are based on the cake being cut into 10 pieces, with 1 serving being 1 slice of cake. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**