I've topped my salmon, but the finishing butter isn't melting
When I take a steak off the grill and top immediately with this compound butter, I find it melts during the 5 minute rest time for the steak. Salmon, however, doesn't radiate as much heat so in that case, I will take the salmon off the grill or out of the oven, top immediately, and tent foil over to hold heat in and melt the butter.