My sister texted me at nine on a Tuesday night asking if I had anything sweet in the house. I had chocolate chips and a mug. Ten minutes later she was eating a warm muffin out of it.
This is a single-serving chocolate chip muffin mug. Six ingredients, one mug, ninety seconds on high in the microwave. No pan, no batch, no leftovers calling your name at midnight.
The trick is oat flour, which keeps the crumb soft, and honey instead of sugar, which keeps it moist. You mix the wet things first, then the dry, then the chips. That order matters more than you'd think.
Step-by-Step Instructions
1. Grease the mug
Lightly grease the inside of a microwave-safe coffee mug with butter or a neutral oil, going up the sides. This keeps the muffin from welding itself to the mug.
2. Mix the wet ingredients
Add the egg white, honey, and vanilla to the mug. Stir with a fork until the honey is fully dissolved and the mixture looks uniform.
3. Add the dry ingredients
Tip in the oat flour and baking powder. Stir until no dry streaks remain, scraping the bottom corners of the mug where flour likes to hide.
4. Fold in the chips
Stir in the chocolate chips until they're spread through the batter. A couple of stirs is enough.
5. Microwave on high
Cook on high for 90 seconds. The muffin should rise above the batter line and look set on top. If the center is still wet, add 10 seconds and check again.
6. Cool before eating
Let the mug sit for a minute so the chocolate chips cool down. Then eat it straight from the mug with a spoon.
Tips & Tricks
- Grease the mug well, all the way up the sides. The muffin climbs as it cooks and sticks if you skip this.
- Mix the egg white, honey, and vanilla first so the honey dissolves before the flour goes in.
- Stir in the chocolate chips last, and only until they're scattered through the batter.
- Microwave times vary by machine. Ninety seconds is the starting point; check at 75 seconds the first time you make it.
Pro Tips
Variations
White chocolate swap
use white chocolate chips, or a mix of dark and white, in the same quantity.
Whole egg version
use one whole egg instead of the egg white for a richer, denser muffin.
Sugar version
replace the honey with 2 tablespoons of granulated sugar and add a splash of milk, since sugar thickens the batter.
Banana version
mash 1 tablespoon of ripe banana into the wet mix and cut the honey to 1 tablespoon.
Nutty finish
sprinkle a few chopped walnuts or pecans on top before microwaving.
How to Store Chocolate Chip Muffin Mug
Refrigerator
This is a single-serving recipe, so there's rarely anything left. If you do have half a muffin, cover the mug and keep it in the fridge for up to 2 days.
Freezer
Not recommended. A microwave muffin freezes poorly and turns spongy when thawed. Make it fresh instead, since it takes minutes.
Reheating
Sprinkle a few drops of water over the top, cover loosely, and microwave for 15 to 20 seconds. Stop before it gets hot or it will toughen.
Frequently Asked Questions
Q: Can I make this without a microwave?
Not really. This recipe is built around microwave steam and speed. An oven would need a different batter and a much longer bake, so it isn't a straight swap.
Q: Why did my muffin turn out rubbery?
Almost always overcooking. Ninety seconds on high is the target, but microwaves differ in power. Next time check at 75 seconds and stop as soon as the top looks set.
Q: Can I use regular flour instead of oat flour?
Yes. All-purpose flour works, but it absorbs more liquid, so the muffin comes out denser and slightly drier. Add a teaspoon of milk if the batter looks stiff.
Q: Is the egg white safe to eat after 90 seconds?
The egg white cooks through in the microwave along with the rest of the batter. If you're at all unsure, check that the muffin is set all the way through and not wet in the middle, and add 10 seconds if needed.
Q: How do I know when it's done?
The top should look set and slightly domed, and the muffin should pull away from the mug sides a little. A wet, shiny center means it needs more time.
Q: Can I double it?
Use two mugs, not one big one. A double batch in a single mug won't cook evenly in the middle. Cook them one at a time so each gets the full 90 seconds.
Chocolate Chip Muffin Mug: Single-Serving 90-Second Recipe
One mug, six ingredients, ninety seconds in the microwave. This chocolate chip muffin mug gives you a warm single-serving muffin with no batch baking.
Ingredients
Instructions
- 1Grease the mug — Lightly grease the inside of a microwave-safe coffee mug with butter or a neutral oil, going up the sides. This keeps the muffin from welding itself to the mug.
- 2Mix the wet ingredients — Add the egg white, honey, and vanilla to the mug. Stir with a fork until the honey is fully dissolved and the mixture looks uniform.
- 3Add the dry ingredients — Tip in the oat flour and baking powder. Stir until no dry streaks remain, scraping the bottom corners of the mug where flour likes to hide.
- 4Fold in the chips — Stir in the chocolate chips until they're spread through the batter. A couple of stirs is enough.
- 5Microwave on high — Cook on high for 90 seconds. The muffin should rise above the batter line and look set on top. If the center is still wet, add 10 seconds and check again.
- 6Cool before eating — Let the mug sit for a minute so the chocolate chips cool down. Then eat it straight from the mug with a spoon.
Questions or cooking notes?
Ask about an ingredient or share a tip that could help someone else.