Recipe : 3 Ingredient Chocolate Mug Cake (No Flour, 5 Minutes)

This 3 ingredient chocolate mug cake is the dessert for nights when you want something sweet in five minutes and the cupboard is nearly empty. All you need is an egg, powdered sugar and cocoa powder. No flour, no butter and no oven: you whisk everything in a mug and microwave it for about a minute.

Because there is no flour, the texture is closer to a soft, fudgy soufflé than a fluffy sponge. It puffs up in the microwave and sinks a little as it cools, which is exactly what it should do.

Why this mug cake works

• The egg does all the work. Whisked egg traps air and sets in the microwave, so you don’t need flour or baking powder.
• Powdered sugar dissolves instantly, so the batter stays smooth even with a quick stir.
• Unsweetened cocoa gives a deep chocolate flavour that balances the sugar.
• It’s naturally gluten-free, as long as your cocoa powder is.

Tips for a perfect mug cake

• Use a big enough mug. A mug that holds at least 10–12 oz (300–350 ml) gives the batter room to rise without spilling over.
• Whisk the egg first. Beat it with a fork until frothy, then add the sugar and cocoa and mix until no dry streaks remain.
• Start low on time. Microwaves vary a lot. Cook for 50 seconds, check, then add 10-second bursts. Stop when the top is just set but still slightly moist.
• Eat it warm. Flourless mug cakes are best within a few minutes of cooking.

Easy variations

• Chocolate chip: stir in 1 tbsp chocolate chips before cooking.
• Mocha: add ½ tsp instant coffee to the batter.
• Peanut butter centre: drop 1 tsp peanut butter into the middle before microwaving.
• Toppings: a scoop of vanilla ice cream, whipped cream, fresh berries or a drizzle of chocolate sauce.

Frequently asked questions

Why is my mug cake rubbery?

It was cooked too long. Take it out as soon as the top looks set; it keeps cooking for a few seconds after the microwave stops.

Can I make it without an egg?

Not this version. The egg is what holds it together. For an eggless mug cake, use a flour-based recipe with milk and a pinch of baking powder.

Can I use regular sugar instead of powdered sugar?

Yes. Granulated sugar works, but whisk a little longer so it dissolves, and expect a slightly grainier texture.

Can I bake it in the oven?

Yes. Pour the batter into a greased oven-safe ramekin and bake at 350°F (175°C) for about 12–15 minutes, until just set in the middle.

Can I double the recipe?

Make two mugs instead of one large one. A single big batch cooks unevenly in the microwave.

Craving more quick desserts? Pair this cake with one of the world’s most popular types of coffee.