heat bacon grease in a large skillet until hot.
add flour to the bacon grease and whisk together. keep heating until the flour is nice and browned.
pour in 2 cups of the milk while whisking vigorously. continue to whisk until all lumps are gone.
once its starring to bubble add rest of milk and continue to whisk to make sure it doesn't lump up.
continue to cook and whisk until just before your desired thickness. but remember it does thicken as it cools. salt and pepper to taste once it starts to thicken a bit. you can do a finger test.. dab pinky finger into gravy and taste. add more salt and pepper if needed.
remove from heat. place 2 biscuits on a plate.
pour milk gravy over biscuits.. amount depends on what you like.. but I completely cover mine.
sprinkle crumbled bacon all over the top.
serve hot. great served with my bacon and jelly toasty and my bacon fried eggs! or serve alone.