Foods that are high in carbohydrates and calcium, and medium-to-low in protein also make ideal sleep-inducing bedtime snacks. Some examples:
apple pie and ice cream (my favorite)
whole-grain cereal with milk
hazelnuts and tofu
oatmeal and raisin cookies, and a glass of milk
peanut butter sandwich, ground sesame seeds
(It takes around one hour for the tryptophan in the foods to reach the brain, so don't wait until
right before bedtime to have your snack.)