Here's a recipe from King Arthur Flour Cook Book.

TEETHING BISCUITS

1/2 cup whole milk
1/4 cup vegetable oil
1/4 cup dark, unsulphured molasses
1 1/2 cups unbleached all-purp. flour
1 1/2 cups whole wheat flour

Blend the liquid ingredients together as best you can.
Stir in the flours, turn out onto a floured surface and
knead for 3/4 min. til dough is well blended and
smooth. Cover and let rest for 20 min. Preheat oven
350 degrees.

SHAPING: Roll the dough out til about 1/4" thick. Cut
into rectangular pieces about 1 x 2 1/2". Biscuits won't
expand much, place on a lightly greased cookie sheet.

Prick with a fork several times for no other reason than
a gauge to check your baby's progress as he/she
works down the biscuit. If you let biscuits rest for 15/20
min. before baking, the gluten will relax and they keep
their shape.

BAKING: Bake for about 30 min. til biscuits are quite
firm. If they seem to brown to fast, turn the heat down
to 325 degrees for the last 10 min.. Let cool and
harden before you wrap them. Makes about 3 to 4
dozen.