This blueberry crumb cake makes a great dessert or decadent pairing with your morning coffee. For left over wrinkle-berries, I've included a recipe for Blueberry Bourbon Syrup. Crumble. 1/3 cup all-purpose flour. 1/3 cup sugar. 1/2 tsp freshly grated cinnamon. 1/4 tsp... #blueberry #bourbon #cake