The eggs help hold these together. I haven't experimented with a chia egg so can't promise that you could subsitute that. Stir your real peanut butter well before measuring it off. Do not drain the oil or your cookies will be extra dry. Oil will leach out of the cookies as they bake. Let them sit on the baking sheet for 10 minutes after you take them out of the oven and they will reabsorb. If you don't have maple sugar, you can make it from maple syrup or...in a pinch...can substitute another granulated sugar.