The prime Historical evidence of chia seed consumption dates back to the Aztec Empire. This time, the black seeds were part of the staple diet. They were grilled and ground to cook the traditional Aztec dish: pinole. The Chumash—Amerindians who lived in California before Christopher Columbus' discovery—were convinced that chia seeds improved their physical performance. Chia seeds come in a variety of colors. You'll find them white with a mild flavor, gray or black with a more pronounced but pleasant flavor.