This chocolate lava mug cake went absolutely viral on TikTok and for a good reason! It’s fluffy and rich, ridiculously easy to make and only needs a couple of simple ingredients.
This lava mug cake is what chocolate dreams are made of. In just five minutes (including cooking time!) you can have an indulgent, moist chocolate cake stuffed with a rich chocolate sauce.
You have to try this one to believe it! Top tip: make sure you use your biggest mug if you want to keep your microwave clean! A small heat-proof bowl will also work in a pinch.
- 2 tbsp (40 g) butter, softened
- 2 tbsp boiling water
- ¼ cup caster sugar
- 2 tbsp cocoa powder
- ¼ cup self-raising flour
- 4 squares dark chocolate
- In a large mug (350 mL / 12.5 oz capacity or larger), stir together softened butter and boiling water until butter has melted. Stir in sugar until well combined. Stir in cocoa powder and self-raising flour until well combined.
- Press the 4 squares of chocolate down into the batter in the centre of the mug, making sure they are quite close together (this will give you a better molten lava centre).
- Microwave for 1 minute on full power until the cake has risen and there is no raw batter on the top of the cake. You can quickly stick a fork or spoon into the centre of the cake to see if it cooked through. Cook in further 10 seconds bursts, if needed (but be careful not to overcook). Serve with whipped cream or ice cream, if desired.
- I recommend eating the mug cake while it is fresh. It isn't designed to keep well.
Substitutions & Tips
- Find the original recipe video on here on TikTok (you don't need to have a TikTok account to view the video).
- Butter: you can substitute butter with margarine.
- Sugar: you can substitute caster sugar with brown sugar or white sugar.
- Flour: you can substitute 1/4 cup of self-raising flour with 1/4 cup of plain flour combined with 1/2 tsp of baking powder.
- Chocolate: you can use milk or white chocolate if you like. You can also use 1 tbsp of chocolate chips, just make sure to press them close together in the centre of the mug cake.
- Why did my cake overflow? If your cake overflowed then you are using a mug which is too small. Use a mug which is at least 350 mL (12.5 oz) or use a small microwave-safe bowl. If your cake starts to overflow, stop the microwave and let the cake sink down then resume cooking.
- Why is my cake hard and rubbery? It is likely that you have overcooked the cake. 60 seconds will be plenty of cooking time for this cake in the majority of microwaves. If you know that your microwave is more powerful than normal microwaves, reduce the power to 80%. Don't confuse the chocolate sauce for uncooked batter. When in doubt, a slightly undercooked cake is far better than an overcooked cake!
Nutrition Information:Serving Size: 1 Mug Cake
Amount Per Serving: Calories: 801Total Fat: 44.9gSaturated Fat: 27.4gTrans Fat: 0gUnsaturated Fat: 12.3gCholesterol: 86mgSodium: 8.2mgCarbohydrates: 87.2gFiber: 6.6gSugar: 62gProtein: 8.5g