In a jar, mix oats, almond milk, coffee, cocoa powder, maple syrup, chia seeds, and vanilla. Stir well.
Seal the jar and refrigerate overnight. Let the oats soak up all the flavors.
In a small saucepan, heat espresso, brown sugar, and cinnamon. Simmer for 3 minutes until thickened.
Before serving, drizzle espresso syrup over the oats.
Take a bite, and question why you ever ate boring cereal.