Divide the dry rolled oats, cocoa powder, and salt between two pint sized ball jars.
Divide the milk, coffee, and sweetener between the two jars. Mix until combined.
Let rest overnight or for at least 4 hours before enjoying.
Enjoy topped with fresh raspberries, chopped almonds, and bittersweet chocolate.
Video
Notes
Coffee: I usually use fresh brewed coffee but leftover cold coffee also works. You can also use cold brew. Mocha-flavored iced coffee and other flavored coffees are also delicious here.
Milk: I usually use vanilla soy milk but unsweetened and unflavored milk also works. Chocolate milk would be really good too.
Chocolate: I usually chop up ¼ ounce of dark chocolate baking chocolate but any kind of semisweet or dark chocolate chip work as well.