This Berry Coffee Cake is a moist and tender cake bursting with fresh blueberries and raspberries, perfect for breakfast, brunch, or a delightful afternoon treat. The cake features a subtle lemon zest for brightness, a rich sour cream base for added moisture, and a unique finish with boiling water poured over the batter before baking, creating a delicate crackled top. Serve it warm with whipped cream or ice cream for an extra indulgence.