• Preheat oven to 350 degrees F.
• In the bowl of a stand mixer, add the room temperature butter and sugar. Using the paddle attachment, beat until light and fluffy, or about 3 minutes.
• Slowly add the egg, lemon zest and vanilla and mix on low speed until smooth. Stop the mixer and add the flour, baking powder and salt, then mix on low speed just until almost combined.
• Add the buttermilk and continue mixing on low until well mixed. Finally, use a rubber spatula to carefully fold in the berries by hand.
• Transfer the batter to a buttered 9" x 9" baking dish, using an offset spatula to spread evenly. Sprinkle about 2 tablespoons of coarse sugar over the cake batter just before baking.
• Bake in a preheated 350 degree oven for 45 minutes, or until a toothpick inserted into the center comes out clean.
• Remove the cake from the oven and let cool completely on a cooling rack before slicing.

How to Make Lemon Glaze

• In a small mixing bowl, add the powdered sugar. Add 2 Tablespoon lemon juice. Stir until combined. Add up to 1 more tablespoon of lemon juice until you reach your desired consistency. (I like the add juice unitl there is a ribbon-like drizzle that melts into the glaze when you lift your spoon)
• Drizzle lemon glaze over the Berry Coffee Cake, Enjoy!