1. Sift flour and mix thoroughly with the salt, sugar and baking powder. Add the peanut butter and mix in with a pastry blender. 2. Beat the egg and add the milk and orange extract to the egg; blend. Pour this mixture into the flour mixture and stir until thoroughly combined but do not beat. 3. Grease a 9 x 5-inch loaf pan. Pour mixture into pan and bake in preheated 350-degree oven for 50-55 minutes. Cool before slicing.