This blueberry lemon cake is a delicious and refreshing dessert that's perfect for summer. The cake is made with fresh blueberries and lemon zest, which give it a bright and tangy flavor. To make this cake, you'll need flour, sugar, baking powder, salt, milk, eggs, vanilla extract, butter, fresh blueberries, and lemon zest. Mix the dry ingredients together, then add the wet ingredients and mix until smooth. Fold in the blueberries and lemon zest and pour the batter into a greased baking dish. Bake for 35-40 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool before serving.