In a large skillet or Dutch oven, melt the bacon grease and butter together over medium heat. Once the fats are melted and shimmering, add the garlic powder, onion powder, Creole seasoning, salt, and black pepper. Stir constantly for about 1 minute. This step, known as "blooming," toasts the spices and unlocks their full aromatic flavor.
Pour all three cans of undrained red beans into the skillet, along with the ¼ cup of water. Stir everything together to combine with the bloomed spices. Take a potato masher or the back of a large spoon and gently mash about one-third of the beans against the side and bottom of the pan. This technique is crucial for releasing the starches from the beans, which naturally thickens the sauce and creates a velvety, creamy texture while leaving plenty of whole beans for bite.
Bring the bean mixture to a gentle simmer. Allow it to cook for 15-20 minutes, stirring occasionally to prevent sticking. As it simmers, the sauce will reduce slightly and become thicker and creamier. Near the end of the cooking time, give it a taste and adjust the seasonings if necessary.
Once the beans have reached your desired consistency, remove the skillet from the heat. Serve immediately by ladling the hot, creamy beans over bowls of warm, cooked white rice. For a traditional finish, garnish with freshly chopped green onions or a dash of your favorite hot sauce.