Thibaut Spiwack, known from Top Chef, recently posted a short Instagram clip that turns chocolate cake into a tiny, fuss-free treat for kids. The idea is simple: everything goes into a single glass jar, you cook it gently, and dessert is ready with almost no washing up. It can also be made ahead and quickly refreshed before serving.
Why parents love this easy chocolate jar cake
This recipe is built for busy households. It combines speed, minimal cleanup, and flavors kids adore. With a few pantry staples and one reusable jar, you get a warm, gooey cake that feels indulgent but is very simple to make.
- Fast: Ready in about 15 minutes of cooking time.
- Minimal cleanup: Everything mixed and cooked in one jar.
- Make-ahead friendly: Prepare up to 24 hours in advance.
- Kid-approved: A soft, chocolatey center that children love.
Ingredients for the single-jar chocolate cake
Gather these small-quantity ingredients before you start. They are easy to scale for more jars.
- 1 large egg
- 1 tablespoon all-purpose flour
- 1 tablespoon granulated sugar
- 1 tablespoon milk
- 2 tablespoons melted butter
- 1½ teaspoons baking powder
- 1 generous teaspoon cocoa powder
- A few drops of vanilla extract
How to assemble and cook the jar cake
- Pick a sturdy glass jar with a lid, like a cleaned yogurt jar or small jam jar. Check it can handle gentle heat.
- Crack the egg straight into the jar.
- Add flour, sugar and milk to the jar.
- Pour in the melted butter and sprinkle the baking powder over the mixture.
- Add cocoa powder and a few drops of vanilla for aroma.
- Close the jar securely and shake vigorously for a few seconds to combine everything evenly.
- Set the closed jar into a saucepan and pour in hot water to come halfway up the jar sides for a bain-marie.
- Simmer over low heat for about 15 minutes. The cake should set while keeping a soft center.
- Remove the jar from the water, let it cool briefly, then open and serve.
Make-ahead tip and quick reheating method
If you want to prepare desserts in advance, mix the jars and refrigerate for up to 24 hours. When ready to serve, warm each jar in the microwave for a short burst.
- Refrigerate: Store sealed jars up to 24 hours.
- Reheat: Microwave for 20–40 seconds to revive the soft center.
- Adjust reheating time based on jar size and microwave power.
Safety notes and practical tips for perfect results
- Use heat-resistant glass. Avoid thin jars that may crack under heat.
- Secure lids are essential while shaking, but remove before microwaving if the lid is metal.
- Keep water at a gentle simmer for the bain-marie to prevent rapid temperature changes.
- For extra fun, top with whipped cream, berries, or a sprinkle of cocoa after opening.
- To serve to small children, check temperature first to avoid burns.
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