Tangy tomato gravy ladled over hot buttermilk biscuits is a simple, vegetarian Southern breakfast family tradition. This old-fashioned dish transforms pantry staples into a warm, satisfying morning meal.
Preheat oven to 425°F and bake the buttermilk biscuits until golden and flaky, about 12-15 minutes.
In a large skillet over medium heat, melt the unsalted butter until sizzling but not browned.
Add the all-purpose flour and whisk constantly for 1-2 minutes to form a smooth roux; avoid browning.
Slowly pour in canned diced tomatoes (including juices), stirring constantly, then add whole milk to thin the gravy.
Bring the mixture to a simmer, add salt, black pepper, and sugar, and cook for 8-10 minutes, stirring often, until thickened and glossy. Serve ladled over hot biscuits.