Oat Flour (Best Option)
1:1 (1 cup oat flour per 1 cup all-purpose flour)Oat flour is finely ground oats, so it naturally complements oatmeal by reinforcing the oat flavor and texture. It contains similar starches and fibers that help thicken and bind the mixture, making it an excellent direct substitute.
When using oat flour, ensure it is finely ground to avoid a gritty texture. Because it lacks gluten, the thickening might be slightly less elastic but still effective in oatmeal. Stir well to prevent clumping.
Compared to all-purpose flour, oat flour produces a creamier and more cohesive oatmeal with a stronger oat flavor, enhancing the dish's authenticity without compromising texture.