Preheat the oven to 350°F (175°C). Lightly grease and flour a bundt pan to ensure easy release.
In a medium bowl, whisk together the flour, brown sugar, baking powder, baking soda, and salt. Set aside for later.
In a large mixing bowl, beat the softened butter using an electric mixer until it’s pale and fluffy (about 2–3 minutes).
Add the eggs one at a time, mixing thoroughly after each addition. Stir in the vanilla extract and lemon zest.
Alternately add the dry mixture and Greek yogurt to the butter mixture, starting and ending with the dry ingredients. Mix until just combined. Don’t overmix.
Toss the blueberries in a little flour to prevent them from sinking. Carefully fold the flour-coated blueberries in the batter.
Spoon the batter into the prepared bundt pan, smoothing the surface evenly with a spatula.
Bake for 50–60 minutes, or until a toothpick inserted into the center comes out clean.
Let the cake rest in the pan for 10–15 minutes, then turn it out onto a wire rack and let it cool completely.
In a small bowl, whisk powdered sugar with 2–3 tablespoons of water until it reaches a smooth, pourable consistency. Adjust water as needed.
Once the cake is fully cooled, drizzle the glaze over the top. Add a touch of lemon zest on top if you'd like a fresh finish.
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