SUBSTITUTES FOR GLUTEN IN BAKING Corn Flour/Starch. Corn flour (or starch as they say in the US) is made from removing and purifying the starch from the centre of sweetcorn kernels. ... Maize Flour. ... Polenta. ... Potato Flour. ... Ground Nuts. ... Buckwheat Flour. ... Oats. ... Tapioca Flour. More items...