Identify your wheat germ role in the recipe: crunch/texture vs nutrition vs bulk.
Choose the substitute from the table: bran swaps (wheat/oat bran) for hearty texture; seed swaps (flax/chia) for nutrition and binding.
Swap by the listed ratio (use fine-milled versions for smoother batter).
If using seed-based swaps (flax/chia), let the batter rest 5–10 minutes to hydrate and reduce graininess.
Bake as directed, then adjust next time: add a small splash of liquid if it seems dry, or reduce chia/seed amount if it’s too dense.