It harbors, by some estimates, up to 500 flavor and olfactory compounds, which can inhabit something as simple as a plain vanilla cake. That's why it's hard to imagine adding another flavor to the mix ...
Set aside a good-sized, microwaveable mug to bake the cake in. Add the butter and milk to another microwaveable mug and microwave on high in 10 second increments, swirling the contents after each ...