- Preheat your oven to 350°F (175°C). Grease and flour a bundt pan to prevent sticking. 
- In a medium bowl, whisk together the flour, brown sugar, baking powder, baking soda, and salt. Set aside. 
- In a large bowl, using an electric mixer, beat the softened butter together until light and fluffy (about 2-3 minutes). 
- Add the eggs one at a time, mixing well after each addition. Then mix in the vanilla extract and lemon zest. 
- Gradually add the dry ingredients to the butter mixture, alternating with the Greek yogurt. Start and end with the flour mixture. Mix just until combined. 
- Gently fold in the blueberries that have been previously tossed in flour. 
- Pour the batter into the prepared bundt pan, smoothing the top with a spatula. 
- Bake for 50-60 minutes, or until a toothpick inserted into the cake comes out clean. 
- Allow the cake to cool in the pan for about 10-15 minutes before inverting it onto a wire rack to cool completely. 
- In a small bowl, mix the powdered sugar with 2-3 tablespoons of water until smooth. Adjust the consistency to your liking; it should be thick enough to drizzle but fluid enough to pour. 
- Once the cake is completely cooled, drizzle the glaze over the top. Garnish with extra lemon zest if desired.