This cherry upside-down coffee cake is the ultimate way to use up all those summer cherries! It's unbelievably moist, packed with juicy cherries, and doubles it's duty as breakfast or dessert!
Make the cherry topping: Melt butter, sugar, and agave in a small saucepan over medium-high heat. Bring to a boil and stir occasionally until caramel is thickened and golden brown. Remove from heat and spread into the bottom of a greased 9-in round cake pan. Arrange halved cherries on top of caramel.
Make the coffee cake: In a large bowl, whisk butter, sugar, eggs, yogurt, buttermilk, and vanilla until smooth. Add flour, baking powder, baking soda, and salt. Gently fold until a smooth batter forms.
Spread batter over cherries and gently smooth top. Bake coffee cake at 350F 40-45 minutes or until a toothpick inserted in middle of cake comes out clean.
Cool cake 5 minutes then run a knife around the edges. Invert cake onto a serving plate and let cool 10 minutes before serving. Enjoy!