This sweet dessert will make you an office break time hero.
In a big bowl, mix all of the ingredients together aside from the butter. Once it's all good and mixed, slowly pour in the butter. Pour the mixture into a greased 9x13 pan.
Let's make that topping. Mix all the ingredients together until well combined. Drop evenly over the batter and give a swirl with a knife.
Bake the whole thing at 350 degrees for 30-40 minutes. While that's going, mix the glaze ingredients together in a separate bowl until combined.
When the cake is ready (and preferably while it's still warm), drizzle the glaze over the top.