Mug Brownie Recipe

Your prep work will go faster if you gather all your ingredients before you start mixing things together. All you need to make your mug brownie is unsalted butter, sugar, brown sugar, salt, a single egg, flour, unsweetened cocoa powder, water, and dark chocolate chips. While you might be tempted to make ingredient substitutions, like opting for salted butter in place of unsalted butter, it really is best to stick to the list for this recipe. As Carli points out, using unsalted butter allows you to better control the saltiness in your dish, which becomes even more pronounced when making a single serving size. 

Likewise, you'll want to use unsweetened cocoa powder for the same reason — you're already adding sugars and chocolate chips, so a sweetened cocoa powder could put the sweetness level over the top. And of course, if you decide after your first go-round that you'd prefer a slightly saltier or sweeter brownie, you can always make those changes with subsequent attempts.

You might be tempted to simply dump the rest of your ingredients into the mug and stir them up, but that would be a mistake. "You want to make sure that the dry ingredients are fully combined for even baking," says Carli. For that reason, it's really important to add the ingredients to your mug in a specific order, stirring after each new addition.

Since your melted butter is a little warm, you want to start by adding your 2 tablespoons of sugar, 1 tablespoon of brown sugar, and ½ teaspoon of salt to your mug. Stir well until the salt and sugars are mixed well and mostly dissolved in the butter.

With the egg nicely whisked in your mug, you have enough wet ingredients to take on more dry ones. Go ahead and add in ¼ cup of flour and 1 tablespoon of cocoa powder. As before, take your time to stir well and combine the ingredients fully. This will give you the smooth, even flavor you want in the finished brownie, without dry clumps of flour here and there. After stirring, add an extra tablespoon of water, and stir again to get the right consistency of the batter.

Also, even though you'll be adding chocolate chips to the recipe, Carli emphasizes that it's important to still use the unsweetened cocoa powder, as it's this ingredient that amps up the chocolate-y flavor of the batter itself.

Once you're satisfied with your chocolate chip choices, it's time to "bake." Simply pop your mug in the microwave and microwave it for a minute. To test to see if it's done (microwave times may vary), prick the center of the brownie with a fork. If the tines come out clean, it's ready. If they don't, try heating for another 15 to 30 seconds. 

Just like that, your personal brownie is ready to eat. Dig into the mug, or remove the brownie to a plate or bowl. And if desired, go ahead and add a topping like ice cream, a favorite brownie-topper. You could also smear a tablespoon of Nutella on top as "frosting," and maybe sprinkle chopped nuts on top of that. Remember, it's just a single brownie, so it's perfectly okay to indulge a little.