• ¾ cup granulated sugar • ¼ cup light brown sugar firmly packed • ¼ cup cocoa powder • 3 Tablespoons all purpose flour • ½ teaspoon salt • 3 Tablespoons all-purpose flour • 1 teaspoon vanilla extract • 3 Tablespoons unsalted butter

Whisk together sugars, cocoa powder, flour, and salt in  a medium-sized saucepan  until lump-free. 

While whisking, pour in the milk and whisk until smooth.

Turn stovetop heat to medium and cook, whisking almost constantly, until the mixture has thickened to a gravy-like consistency and the whisk leaves tracks through the chocolate.

Remove gravy from the heat and vanilla extract and butter, one piece at a time, whisking after each addition until incorporated.

Chocolate gravy will thicken as it cools. Serve it warm over homemade biscuits.