Heritage Grand Bakery uses Astrie Mills on site to grind the ancient grains they grow in Europe into a nutritionally dense flour that is used in many of the restaurant's menu items and baked goods. The Astrié Mill was designed in the 1960s by Pierre & André Astrié.

Traditionally, stone mills crush grains under the weight of a turning stone. The Astrie Mill uses granite stones to gently remove the bran and shave the kernel, resulting in a superior, healthy flour that is easily digestible and nutritious.