Method
Toast the oats

Set a medium, heavy-bottomed saucepan over medium heat. Add 60 g of old-fashioned rolled oats and cook, stirring and shaking the pan often, for 5 to 7 minutes. Stop when the flakes are dry, lightly golden at the edges, and smell like toasted cereal; lower the heat if any spots darken quickly.
05:00Simmer the oat base
Pour 240 ml of water slowly into the hot saucepan, then add 720 ml of whole milk, 1 g of ground cinnamon, and 1.5 g of fine sea salt. Stir along the bottom as the mixture comes to a gentle simmer over medium-low heat. Simmer for 5 minutes, stirring often, until the oats soften and the liquid looks slightly thicker; do not let the milk boil hard.
05:00Take the long rest

Remove the saucepan from the heat and cover it. Leave the oat base undisturbed for 20 minutes so the flakes fully swell and the toasted flavor settles into the milk. At the end, the oats should be very soft and the liquid should coat a spoon lightly.
20:00Blend and finish the cocoa

Chop 60 g of 70% dark chocolate into small pieces. Set an immersion blender in the saucepan, keep the bell fully submerged, and blend until no oat pieces remain and the base looks smooth. Add 30 g of unsweetened cocoa powder, then whisk in 60 g of 70% dark chocolate and 45 ml of pure maple syrup. Warm over low heat for 3 to 5 minutes, whisking until the chocolate has melted and the cocoa is glossy and steaming; keep it below a boil.
03:00Pour the long-rest round
Remove the saucepan from the heat and whisk briskly until a fine foam gathers on the surface. Divide the cocoa evenly among heatproof mugs and serve immediately, while it is creamy but still easy to sip.
Smart Substitutions
- No whole milk? Use unsweetened oat beverage for a lighter, more grain-forward cocoa.
- No maple syrup? Use light brown sugar, adding it with the cocoa so it dissolves completely.
- No 70% dark chocolate? Use semisweet chocolate and reduce the maple syrup slightly to keep the drink balanced.
- No immersion blender? Mash the softened oats thoroughly, then pass the cocoa through a fine sieve for a thinner but smooth drink.
Tips and Variations
- Keep the oats pale gold rather than brown; their aroma should suggest toasted cereal, not burnt nuts.
- Hold the immersion blender bell below the surface before switching it on to limit hot splashes and excess foam.
- Fill the serving mugs with hot water while the cocoa finishes, then empty them just before pouring so the drink stays warm at the table.
What Went Wrong?
- Cocoa is too thick Whisk in hot water or milk a small splash at a time until it pours easily.
- Cocoa is too thin Keep it over low heat for another 2 to 3 minutes, whisking, so the oat starches tighten the drink.
- Flavor tastes bitter Check that the oats did not scorch and the cocoa did not boil; balance the cup with a little more maple syrup.
- Oat pieces remain Blend again with the bell fully submerged, moving it slowly around the bottom and sides of the saucepan.
Nutrition Estimate
- Fiber: 6 g per serving
- Sodium: 230 mg per serving
Nutrition disclaimer:This recipe is provided for general cooking information only. Nutrition values are estimates and may vary by ingredients, brands, preparation methods, and serving sizes. Check ingredient labels and follow appropriate food-safety practices. This content is not medical, dietary, allergy, or professional food-safety advice.
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