Step 1: Add the Dry and Wet Ingredients in Order: Pour the warm water and softened butter into the pan. Then add the mixed whole wheat and bread flours, dig a well and drop in the yeast, and place the honey, oats, and salt substitute in a corner away from the yeast. Whole wheat drinks more water than white flour, so the extra tablespoon of water versus the white loaf is correct.
Step 2: Seat the Pan and Close the Lid: Lock the pan into the machine and confirm the kneading paddle is firmly in place, then close the lid. Whole wheat dough is heavier and wetter than white, so a loose paddle will simply fall off mid-knead.
Step 3: Select the Whole Wheat Cycle: Choose the "Whole Wheat" setting (or "Basic" with a lighter crust). The program kneads longer and proofs more fully, about 3.5–4 hours. Select 2-pound, light or medium crust, then press start.
Step 4: Let It Rise and Bake: Do not open the lid while it works. Because the bran is heavy, whole wheat dough will not climb as high as a white loaf — that is expected, not a failure. Through the window you will see it rise slowly and form a deep, golden-brown, crisp crust during the bake.
Step 5: Cool and Slice: When the cycle ends, lift out the pan and turn it onto a cooling rack. Whole wheat is a touch wetter than white, so cool at least 45 minutes — ideally a full hour — before slicing, or the crumb sticks and compresses.