3-Ingredient Mug Cake (Ready in 5 Minutes)

When a sweet craving hits and you have zero patience, this 3-ingredient mug cake is the answer: just flour, sugar and milk whisked in one mug and microwaved for about a minute and a half. No egg, no butter, no mixer, no oven to heat up, and barely anything to wash up afterward. It comes out warm, soft and lightly sweet, ready for a spoonful of whipped cream or a dusting of powdered sugar.

Why you'll love this

• Truly three ingredients you already have: all-purpose flour, sugar and milk, plus an optional pinch of salt or a few chocolate chips
• Start to finish in about 5 minutes, with only 90 seconds of actual cooking
• Mixed and cooked in a single mug, so cleanup is one mug and one fork
• Eggless and butter-free, with a soft, tender, just-set crumb when you pull it at the right moment

Key ingredients & swaps

• All-purpose flour — gives the cake its structure; measure it by spooning into the cup and leveling rather than scooping, since packed flour is the top cause of a dense, heavy mug cake
• Granulated sugar — sweetens and keeps the crumb tender; whisk it into the flour first so it disperses evenly, and superfine or caster sugar dissolves fastest for the lightest texture
• Milk — the only liquid, so it carries all the moisture; use it at room temperature so the batter heats evenly in the microwave, and whole milk gives the richest result
• Pinch of salt (optional) — sharpens the sweetness and rounds out the flavor; a tiny pinch is all it takes
• Chocolate chips (optional) — stir in a spoonful for melty pockets of chocolate, or drop a few on top just before microwaving

How to make it (step by step)

1. 

   1

   Pick the right mug

   Choose a microwave-safe ceramic or glass mug of at least 10 to 12 ounces, ideally wide with straight sides. A roomy mug lets the cake rise without climbing over the rim and helps it cook evenly.

2. 

   2

   Whisk the dry base

   Add the flour and sugar (and a pinch of salt, if using) and whisk them together with a fork until evenly combined. Doing this first means no dry flour pockets hide in the bottom of the mug.

3. 

   3

   Stir in the milk

   Pour in the room-temperature milk and stir just until the batter is smooth and free of lumps, scraping the bottom and sides. Stop the moment it comes together; over-stirring develops gluten and turns the cake rubbery.

4. 

   4

   Microwave until just set

   Microwave on high for about 1 minute 30 seconds, until the cake has risen and the center looks set rather than wet. Microwaves vary, so if it is still glossy in the middle, add time in 15-second bursts and check after each.

5. 5

   Rest, then serve

   Let the mug sit for 1 to 2 minutes; it keeps cooking and firms up as it cools, so this short rest is what saves it from drying out. Eat it warm straight from the mug, with whipped cream or a dusting of powdered sugar if you like.