Grab a jar or bowl: A 12–16 oz jar is perfect for one serving.
Mix the wet ingredients: Add 1/2 cup milk, 1/4 cup Greek yogurt, 1–2 tablespoons Biscoff spread, 1–2 teaspoons maple syrup or honey, 1/4 teaspoon vanilla, and a pinch of salt.
Stir until smooth. If the Biscoff is stiff, warm it for 10–15 seconds to loosen.
Add the dry: Stir in 1/2 cup rolled oats and 1 teaspoon chia seeds (if using). Add a pinch of cinnamon.
Adjust texture: For creamier oats, add a splash more milk.
It should look slightly loose—the oats will thicken overnight.
Chill: Cover and refrigerate for at least 4 hours, ideally overnight.
Serve: In the morning, stir and top with crumbled Biscoff cookies, a drizzle of extra Biscoff, sliced banana, or a handful of berries.