The most favoured gluten/grain free flour substitute in my kitchen is almond meal. It is finely ground blanched almonds and is also known as almond flour. It has a slightly sweet flavour so you don’t have to add as much sweetener when baking with it. Almond meal/flour is rich in manganese which helps the body heal after injuries and also helps the body break down carbohydrates. Almond flour is also rich in magnesium, which can help control your blood sugar levels. It's rich in vitamin E and other antioxidants, which may help reduce the risk of serious health conditions like cancer, diabetes, stroke, and heart disease. Almonds are also a good source of calcium.
All kinds of nuts can be ground down to make a meal and are excellent for raw cheesecake or pie bases. Nut meals/flours are best stored in airtight containers in the fridge or freezer to prevent them going rancid.