Adapted from Yogurt Biscuits on AllRecipes.
3/4 cup all-purpose flour
3/4 cup whole wheat flour
1/4 teaspoon salt
2 teaspoons baking powder
1/3 teaspoon baking soda
2 tablespoons cold margarine or butter
1 tablespoon white sugar
2/3 cup non-fat plain yogurt
Combine flours, salt, baking powder and baking soda in a bowl. Using a fork or pastry cutter, cut in margarine until crumbly. In a measuring cup, combine yogurt and sugar; stir into the dry ingredients until just moistened.
In the bowl, knead the dough together 4 or 5 times. Place on a baking sheet (either coated with non-stick spray or use a silpat baking liner). Pat dough into a 8" x 4" rectangle. Cut into eight square rolls but do not separate (this is a perforation for breaking apart. Bake at 450° for 12-15 minutes or until golden brown.
These are good warm from the oven or as leftovers the next day when split in half and toasted.