Whole Milk and Unsalted Butter (Best Option)
3/4 cup whole milk + 1/4 cup melted unsalted butter per 1 cup heavy creamHeavy cream is approximately 36-40% fat, which contributes to the dough’s tenderness, moisture retention, and flavor. Combining whole milk (about 3.5% fat) with melted unsalted butter (about 80% fat) approximates this fat content, providing similar mouthfeel and dough elasticity.
To ensure proper integration, melt the butter and mix it thoroughly with the milk before adding to the dough. Use at room temperature to avoid shocking the yeast or altering dough temperature.
Compared to heavy cream, this substitute yields doughnuts with slightly less richness but preserves the soft, airy crumb and golden crust typical of classic doughnuts.