Wash hands with soap and water.

Combine flour, whole wheat flour, yeast, sugar, salt and powdered milk in a one gallon resealable freezer bag. Squeeze upper part of bag to force out air and seal bag. Shake and work bag with fingers to blend ingredients.

Add oil and warm water to dry ingredients. Reseal bag. Mix by working bag with fingers until dough is completely mixed and pulls away from bag.

On a floured surface, knead dough 5 minutes or until smooth and elastic, adding flour as needed. Put dough back into bag and let it rest 10 minutes.

Shape dough on greased baking sheet or put into a 4x8 inch greased loaf pan. Cover with a clean cloth or plastic wrap and let rise until doubled in bulk.

Preheat oven to 350 °F and bake for about 30 minutes or until golden brown. (This may take between 25 and 45 minutes to bake.)