If you’ve ever skipped breakfast in favor of a few extra minutes of sleep, you know how it feels to be hungry at work. And if you’ve ever been hungry at work, you likely know how it can affect your mood, productivity, and energy level. Rather than default to the vending machine—and let hunger dictate your breakfast or snack choice—you can be prepared with your own homemade energy bars made with real, whole ingredients such as nuts, seeds, nut butters, oats, fruit, and more. We’ve rounded up a handful of go-to, easy, no-bake bar recipes that don’t require a ton of prep or cooking time. We also broke down a few tips for foolproof bars. For instance, if you want to measure sticky ingredients, such as peanut butter, you can grease your measuring cup first so the peanut butter slides right out. Read on to learn more about these quick, portable, reliable snacks.