Classic
Salted Caramel Mug Cake
Dairy-free caramel-style cake with brown sugar depth and a salty finish.
Steps
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Stir flour, brown sugar, baking powder, and salt in the mug until the sugar lumps are small.
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Add oat milk, oil, and vanilla. Mix until glossy and scrape the bottom well.
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Drop caramel sauce on top and swirl once so some stays visible.
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Microwave 70-80 seconds. The caramel may bubble, so use a 12 oz mug.
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Rest two minutes, then add one extra pinch of salt if you like a sharper caramel finish.
Tips from the test kitchen
Use a wide mug if your caramel sauce is thick. It bubbles up before it settles into the crumb.
Success guide
Make it work the first time
Expected texture
Expect a cozy, steamed-cake texture rather than oven-browned edges. Pull it when the surface is set and let the mug finish the job while it rests.
Success tips
- Use a microwave-safe mug with visible headroom. If the batter fills more than about half the mug, move it to a larger mug before cooking.
- Start with the lower end of the microwave time in the steps. Add time in short bursts only if the center still looks wet.
- Let the cake rest before eating. The crumb keeps setting after the microwave stops, and the mug will be very hot.
- This recipe avoids a whole egg, which helps prevent the bouncy texture people often dislike in small mug cakes.
Substitutions
- Plant milk
- Use the milk listed in the recipe for the most predictable texture. Thinner plant milks may need a few seconds less cooking.
- Fat
- Neutral oil keeps mug cakes moist. Melted butter works in some chocolate or vanilla cakes, but it can make the crumb firmer as it cools.
- Flour
- Do not assume a direct gluten-free flour swap unless the blend is labeled cup-for-cup; the texture may turn gummy.
Troubleshooting
- Rubbery texture
- Usually caused by overmixing, overcooking, or too much egg for one mug. Mix only until no dry flour remains and stop at the first set-top cue.
- Dry crumb
- The cake likely cooked too long. Next time start at the low end of the time range and let rest instead of microwaving until fully dry.
- Overflow
- The mug was too small or too full. Use more headroom and set the mug on a paper towel if your microwave runs hot.
- Wet center
- Microwave in one short burst, then rest again. A slightly glossy center is fine; a puddle of batter needs more time.
Variations
- Add a tiny pinch of cinnamon or nutmeg to make the cake taste warmer.
- Serve with a scoop of ice cream if you want a hot-and-cold dessert.
- Top with coconut yogurt or dairy-free ice cream after resting.
