Though I have not tried this recipe myself, I did find this online. Combine 2⁄3 cup all-purpose flour, 1⁄2 cup yellow cornmeal. 1⁄3 cup granulated sugar, 1 tbsp baking powder, 1 ⁄2 tsp salt, and 2 tbsp vegetable oil or butter. Be sure to use this additional oil and butter, in addition to what is already called for in the recipe. There is added fat in the Jiffy Mix that you will need to make up for, when replacing Jiffy mix with this homemade version.