The texture of this cake is not light and fluffy. It’s a thicker more dense cake and has a nice crumb to it. I’m not sure what you were expecting. There are many different types of cake, This cake is full of flavor and delicious served warm or cooled, or heat up by the slice if you have leftover. If you were hoping for a lighter fluffier cake, or something similar to a box cake mix this will be more dense. I’m not sure if you overmixed, but alternating the flour mixture with buttermilk does help to keep the cake from becoming too heavy, so possibly.