Coffee Cake in a Mug

I haven't tried this yet but it gets excellent reviews (unlike the chocolate cake in a mug, which gets mixed reviews) and I wanted to put it down here with all of the little additions and options that I've found.

• 1 mug (small if you want it to puff up over the top, large if you don't.) Add the following:
• 1 Tb. butter (soften in mug, try not to melt it)
• 2 Tb. sugar (stir into butter till it's fluffy)
• Egg (break one into a small bowl and beat it, use half an egg for each mug.  If you are only making one you can use the whole egg, or you could actually leave it out but it will be less cake-y.  You could also use 1/8 cup egg product.
• 2 Tb. sour cream (can sub. yogurt, greek yogurt, buttermilk, or even regular cream.)
• Few drops vanilla
• Pinch salt
• 1/4 cup flour
• 1/8 tsp. baking soda

Crumb topping:
In separate bowl, mix 1 Tb. softened butter, 2 Tb. flour, 1 Tb. brown sugar, 1 tsp. cinnamon.  Mix together with a fork or with your fingers till it's crumbly and add to the top of your mug full of batter.

Microwave for 1 minute, then microwave for 10 second intervals till it's done to your liking.  (Careful, it'll be very hot when it first comes out of the microwave.)

Some of the reviewers said they used pumpkin instead of the egg, but that got mixed reviews.  Some added raisins, some added cocoa to make it chocolaty.  I was thinking that if you use regular cream instead of sour cream you'd need to use about half a tsp. of baking POWDER instead of baking soda to make up for the loss of the acid.

Anyway, nice to have an individual sized dessert when you crave something.  :)