Whisk almond milk and whey protein until smooth. Add rolled oats, instant espresso, chia seeds, chocolate chips, and vanilla extract and mix until combined.
Add the oat mixture into a resealable container or jar and set aside.
Mix espresso or strong brewed coffee with maple syrup. Pour on top of oat mixture, cover, and refrigerate overnight.
Serve chilled or microwave for 1 to 1 1/2 minutes before serving. Top with whipped cream, if desired.