Add old-fashioned oats or quick-cooking oats to a blender or food processor. Fill it only halfway so the blades can move freely. Blend on high speed until the oats turn into a fine, flour-like powder.

Versatile, tasty oat flour adds tenderness and nutty flavor to baked goods. Here’s how to make oat flour yourself, plus a few of our favorite brands.

Ingredients: For the wet batter: 1 cup milk of choice (240 ml) 1/2 cup all-purpose flour (60 g) 1/2 cup cornstarch (60 g) 2 ...