Half-and-Half with Butter (Best Option)
3/4 cup half-and-half + 1/4 cup melted unsalted butter per 1 cup heavy creamHeavy cream is about 36-40% fat, which contributes to the moist, tender crumb of pound cake. Combining half-and-half (10-12% fat) with melted butter increases the fat content to approximate heavy cream's richness, preserving the cake's texture and mouthfeel.
To ensure proper incorporation, melt the butter and mix thoroughly with chilled half-and-half before adding to the batter. Avoid overheating the butter to prevent separation. This mixture should be used immediately for best results.
Compared to using heavy cream, this substitute yields a pound cake with very similar moisture and richness, with negligible differences in flavor and crumb structure.