I found this recipe online and decided to give it a whirl! I followed the directions given on the site and it was actually very easy. However, when I made my topping, I accidentally melted the butter rather than getting it to room temperature. It wound up making a pasty mixture rather than a crumbly one. So, when I finished with the cake recipe i just mixed in the 'topping' mixture, it gave a swirl effect to the cake. I then topped the cake with brown sugar, sugar and cinnamon. I had to cook the cake 45 minutes to get it done. The recipe said only 30 minutes, but that wasn't working for me!
This recipe was simple to follow and used such common ingredients. Both my husband and I love the cake...and Starbucks will be feeling the loss soon enough!