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Surprisingly, the star ingredient in these rolls is leftover mashed potatoes. They contribute to the dough's softness and flavor, giving the rolls a unique richness. You can use homemade mashed potatoes that include butter, cream, and seasonings, or opt for good-quality store-bought options while ensuring they are made from real potatoes—not potato flakes.
Tip #1: Use Milk for Enrichment
When making the dough, it's recommended to use a mix of milk and water rather than 100% water. This approach adds extra fat to the dough, enriching it, resulting in a buttery texture that elevates your rolls.