I made this recipe for friends at a play date, and it was a hit! I substituted 1/2 T vinegar with the rest of 1/2 cup milk for buttermilk, and it worked great! I think lemon zest is the secret ingredient that makes this cake delicious. Serves 6-8 ½ cup unsalted butter, room temperature Zest… Continue reading Buttermilk-Blueberry Breakfast Cake