Red Velvet Mug Cake Recipe

This red velvet mug cake delivers a single serving of soft, cocoa-tinted cake in about two minutes flat. Everything is stirred right in the mug, microwaved, and finished with a swirl of cream cheese frosting, so it is the perfect answer to a late-night craving. Moist, tender, and just rich enough, it scratches the red velvet itch without baking a whole cake.

Why you'll love this

• Ready in around 12 minutes, with just a couple of minutes in the microwave
• A single-serving portion mixed right in the mug, so barely any washing up
• Oil and buttermilk give a genuinely soft, moist crumb, not a dry, spongy one
• That classic red velvet cocoa tang, finished with cream cheese frosting

Key ingredients & swaps

• All-purpose flour — the structure; spoon and level it and resist adding more, as too much flour is what turns a mug cake dry and bready
• Cocoa powder — the subtle chocolate note that defines red velvet; just a little, since classic red velvet is lightly chocolatey rather than deeply chocolate
• Buttermilk — the tang and tenderness; its acidity reacts with the leavening for a soft, moist crumb, and it is the key to that signature red velvet flavor, though milk with a drop of vinegar stands in nicely
• Vegetable oil — keeps the cake moist; oil stays liquid at room temperature and distributes evenly in the microwave, giving a more reliably moist crumb than butter in a quick mug cake
• Red food coloring — purely for that classic red velvet color; add it with the wet ingredients and stir until evenly tinted
• Baking powder — the lift that gives the cake its rise in the microwave's fast, intense heat; measure it carefully, as too much can make the cake puff up and then collapse

How to make it (step by step)

1. 

   1

   Choose the right mug

   Use a wide, microwave-safe ceramic mug rather than a tall, narrow one, and never metal. A wider mug lets the cake cook evenly and rise without overflowing, while a tall mug cooks unevenly and can spill over.

2. 

   2

   Mix the dry ingredients

   Stir the flour, sugar, cocoa powder, baking powder, and salt together in the mug until evenly combined, breaking up any cocoa lumps against the side.

3. 

   3

   Add the wet and combine

   Add the oil, buttermilk, vanilla, and red food coloring, and stir well with a small spoon or fork until the batter is smooth and evenly red with no dry pockets. Stir just until smooth; overmixing develops gluten and makes the cake tough, so stop once it comes together. Fold in chocolate chips if using.

4. 

   4

   Microwave in short bursts

   Microwave on high for about 60 to 90 seconds, starting with 60 seconds and checking before adding more in 10 to 15 second bursts. Microwaves vary a lot in power, so the first time you may need to dial the timing in.

5. 

   5

   Check for doneness

   It is done when the top looks set and springs back to a light touch and the center is just cooked but still moist. A slightly underdone cake is far better than an overdone one; overcooking is what makes mug cakes dry and rubbery, so pull it the moment the top sets.

6. 

   6

   Cool, then top

   Let the cake cool for a minute or two, as it keeps cooking from residual heat. Then add a swirl of cream cheese frosting or whipped cream, which softens slightly against the warm cake, and eat it straight from the mug.