I have had a white rub made with flour, garlic, cracked black pepper,lawrys seasoned salt, onion powder…it was white because of the flour, but that was not the main ingredient, just a filler.
On BBQ America there was a segment on a place called Hickory Stick BBQ in Shreveport that used a white powdery rub on chicken and ribs. It appeared to be flour based with spices added. Anyone made or tasted a similar rub? The host seemed to really like it.