Grape seed flour is made from the seeds of grapes that have been used to make wine. The seeds are ground into a fine powder that is roughly the same texture as wheat flour. The pulp, skins, seeds and stems that remain after wine product are called pomace. Some of the pomace is produced when grapes are freshly crushed because the wine has no contact with grape skin, as in white wines, while some pomace spends time in contact with the grape juice during fermentation, as in red wine. There are tons of pomace produced every year in the wine industry and much of this is discarded. Grape seeds have long been used to produce grape seed oil, and grape seed flour is just another alternative. Grape skins can also be used to make flour, but are much less commonly used than grape seeds.
The grape seed flour has a strong fruitiness to it that you won’t find in many other flours – largely because it comes from a fruit! Grape seed flours will taste different depending on what kind of grape they come from, so you’ll pick up more red berry notes in a flour made from Cabernet sauvignon grapes than you will in one made from chardonnay grapes. Grape seed flour has a lot of nutritional value to it. It is very high in fiber, calcium and potassium, and it contains many antioxidants. Grape seed flour is gluten free.
The flour pictured above – White Lily Red Grape Seed – is a grape seed flour blend, and blends are typically the best and easiest way to use grape seed flours. When you blend a portion of grape seed flour with regular wheat flour, you get a lot of flavor from the grape seeds, but you still have the ease of use of the wheat flour. When using grape seed flour, it is best to substitute a small amount into your recipe. Since it is a gluten free flour, grape seed flour will often create a slightly denser product if used in large quantities. It will add a bit of a whole grain texture to a bread or baked good, as well as quite a bit of color. White wine grapes will lend a tan color to baked goods, while red wine grapes will add a darker, purple-brown color to them.