Perfect for any time of day, this Bundt-style coffee cake is an all-around crowd-pleaser for breakfast, brunch, teatime, and even dessert. A rich and buttery batter is handcrafted from scratch with premium ingredients like buttermilk, brown sugar, eggs, vanilla, and diced apples. Baked into the top is a decadent streusel crumble made of walnut pieces, brown sugar, cinnamon, oats, and butter.