Unsalted Butter (Best Option)
1:1 (use equal volume to coconut oil)Unsalted butter is a solid fat at room temperature like coconut oil, which helps create the desired tender and moist crumb in brownies. The milk solids in butter contribute to browning and flavor complexity through the Maillard reaction during baking.
For best results, melt the butter before mixing to mimic the liquid state of coconut oil, ensuring even incorporation. Watch for slight changes in baking time as butter-based batters may brown faster.
Compared to coconut oil, butter adds a dairy richness and slightly less tropical flavor, but it maintains the fudgy texture and moistness that are key to good brownies.