Brew and cool the coffee. Make a shot of espresso or a small amount of strong coffee. Let it cool fully so it doesn’t thin out the oats.
Mix the oat base. In a jar or bowl, combine 1/2 cup rolled oats, 1–2 teaspoons chia seeds, a pinch of salt, 1/2 cup milk, 2–3 tablespoons cooled coffee, 1–2 teaspoons maple syrup, and 1/2 teaspoon vanilla.
Stir well so the chia doesn’t clump.
Prepare the “cream” layer. In a separate small bowl, mix 1/3–1/2 cup Greek yogurt with 1–2 teaspoons maple syrup and a tiny splash of vanilla. For a true tiramisu feel, fold in 1 tablespoon mascarpone. Taste and adjust sweetness.
Layer it up. Spoon the oat mixture into a jar.
Add the yogurt mixture on top for a layered effect. If you prefer, stir everything together instead for a creamier, uniform texture.
Add cocoa. Dust the top with unsweetened cocoa powder. You can sift it for an even layer.
Add a few chocolate shavings or cocoa nibs if you like.
Chill overnight. Cover the jar and refrigerate for at least 4 hours, ideally overnight. The oats and chia will soften and thicken.
Finish and serve. In the morning, give it a quick stir if needed. Top with extra cocoa, a drizzle of maple syrup, or a sprinkle of chocolate chips.
Eat cold, or let it sit at room temp for 10 minutes if you prefer it less chilled.