Preheat and Prepare: Preheat oven to 350°F. Use 1 Tablespoon butter to generously grease a 13x9-inch baking dish so the rolls don’t stick.
Arrange the Rolls: Place the 12 mini potato rolls snugly in the pan.
Make the Garlic Butter: In a microwave-safe bowl, combine the remaining 4 Tablespoons butter, 2 teaspoons garlic powder, 1/4–1/2 teaspoon salt, and 1 teaspoon dried parsley. Microwave for about 1 minute until melted. Stir well .. garlic powder settles fast.
Brush Generously: Brush most of the garlic butter over the rolls. Really use the basting brush and dig into the bottom of the bowl so every bit of garlic coats the tops. Don’t leave flavor behind.
Bake: Bake at 350°F for 5–10 minutes, just until warmed through and lightly golden. Do not overbake .. this is a quick heat-through, not a full bake.
Final Butter Finish: Remove from oven and brush with the remaining garlic butter. That second coat is what turns basic rolls into full-blown garlic butter rolls.
Serve warm. Guard the pan if necessary.