In a medium bowl, stir together peanut butter, vanilla, and maple syrup/honey (if using) until smooth.
Add coconut flour and mix well. The mixture will thicken quickly. If it's too doughy then add 1 tablespoon of flour at a time until desired consistency is reached.
Press the dough into a parchment-lined small dish or loaf pan.
Freeze for about an hour, then slice into bars or toddler-friendly squares.
