Do not use nuts (pepitas and sunflower seeds are good options) and replace the nut butter with sunflower butter.
Pour the liquid ingredients into the dry ingredients. Use a big spoon to mix them together until the two are evenly combined and no dry oats remain. This takes some arm muscles, but you can do it! If the mixture was easy to mix together, that’s a sign that you need to add some more oats—sprinkle in more oats until you can’t incorporate any more.
Transfer the mixture to the prepared square baker. Use your spoon to arrange the mixture fairly evenly in the baker, then use the bottom of a flat, round surface (like a short, sturdy drinking glass) to pack the mixture down as firmly and evenly as possible.
Cover the baker and refrigerate for at least one hour, or preferably overnight. (The oats need time to soak up some of the moisture so they aren’t sticky.) When you’re ready to slice, lift the bars out of the baker by grabbing both pieces of parchment paper on opposite corners. Use a sharp knife to slice the bars into 4 even columns and 4 even rows.Wrap individual bars in plastic wrap or parchment paper (if you store them all together, they will stick to one another). Bars keep well for several days at room temperature, a couple of weeks in the fridge, or several months in a freezer-safe bag in the freezer for best flavor.
