Chocolate Chip Coffee Cake

"This Chocolate Chip Coffee Cake is soft and tender, and it’s topped with an amazing brown sugar + cinnamon streusel. Oh, and it’s packed with chocolate chips, too! There are 3 keys to a good coffee cake: It can’t be dry. Sometimes all-butter cakes can be on the dry side. This recipe solves that problem thanks to a generous amount of sour cream. It needs a good streusel topping. The crumble topping of this Chocolate Chip Coffee Cake is the same streusel I use for all of my coffee cakes and most of my homemade muffins. It’s crumbly and cinnamon-y in the best way possible. Oh, and it includes a pinch of ground ginger in there for a fun layer of flavor. It must be tender. The cake portion of a good coffee cake should melt in your mouth. The key is creaming the butter and sugar together long enough until it’s light and fluffy. This will take 3-4 minutes in the mixer, but you will see the difference in texture. Oh, and the butter must be at room temperature."