A fantastic coffee cake recipe, it comes together fairly quickly, is dense and delicious and has a crunchy topping and glaze. Besides, it contains the magic words brown butter, so it really is a cake you should make now and keep on making whenever you need a hug.
Butter or spray a 9x4-inch loaf pan or a 9-inch square pan.
Line with parchment paper if wanted.
For the streusel:
In a small bowl mix ¾ cup light brown sugar, ⅓ cup all-purpose flour, 1 teaspoon ground cinnamon and 4 tablespoons unsalted butter together until the mixture resembles wet sand. Reserve.
For the cake:
Melt ¾ cup unsalted butter in a saucepan with high sides over medium heat until it begins to foam. Bubbles will appear and a chirping noise will begin. Let it boil away until the bubbles and noise subside and the surface covers with foam.
Lower the heat and watch carefully, twirling the pan a few times until a nutty smell appears and, beneath the foam, the butter is amber colored. Be careful not to burn it!. You have brown butter now. Transfer it to a medium bowl and let cool slightly.
Add ¼ cup whole milk (first to lower the temperature), 2 large eggs and 8 ounces sour cream to the warm butter and mix well but don't beat.
In a large bowl sift together 2 cups all-purpose flour, 1 teaspoon baking powder, ½ teaspoon baking soda and ½ teaspoon salt. Add ¼ cup white sugar and ½ cup light brown sugar and mix to combine.
Make a well in the center and add the wet ingredients. Mix with a spatula until combined, like you would a muffin mix, but careful not to overmix.
Spoon half of this batter in the prepared pan. Sprinkle with half the streusel mixture. Cover with the other half of the batter and end with the remaining streusel.
Bake for 40-45 minutes, depending on the pan you use until a tester comes out clean. The loaf pan might take a bit more.
Let cool for 10 on a wire rack and carefully unmold. Some sugar might be stuck to the sides.
For the glaze:
Mix ½ cup powdered sugar and 1 tablespoon milk or lemon juice until creamy and lump free.
Drizzle over the cake.
Keep wrapped at room temperature for a few days.
Notes
Pans: this cake was both great as a loaf and as a small sheet cake.Sugars: both white and brown sugars are used, giving it sweetness as well as a caramel undertone that is fantastic with the brown butter.Sour cream: it adds a lot of moisture to this cake and an unmistakable dense crumb that is so particular with coffee cakes. Ingredients: use the best quality you can afford. This cake relies on simple ones, such as butter, for flavor, so the best ones will render the best results.Serving: a glazed coffee cake is always my first choice, but this one can be served plain.Storing: it keeps well for a few days at room temperature and it can be frozen for a month, well wrapped.Flavorings: feel free to add other flavorings that complement the cinnamon, such as orange zest. Or try a new one, like ground cardamom.