Baby-Approved Teething Biscuits
Babies love these. You could make shapes if you want, but I like to keep in mind that I'm cooking for a baby who is going to make a gooey mess out of these. Perfection is completely unnecessary.
I like to keep bananas on hand and when I see some turning brown before we can use them, I peel them, slice them into 2- to 3-inch stumps, lay them on a cookie sheet, and freeze. Then I bag them for banana breads, muffins, and teething biscuits. So while I said 2 mashed bananas that is more of a good guess than an exact number. The banana is the moisture. If you need more moisture, add more banana. If you need less moisture, add more flour. (Personally, I find that after being frozen bananas are really sweaty and easier to work with for baked goods than if they were never frozen.)
I have a big cookie sheet where I move the long thin ropes of dough to wait overnight. Then I slice them and move them to a greased cookie sheet to bake them. I have to do several trays this way.