A quantity of something about the volume of a dessertspoon, or 2½ fluidrams.(noun)
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Use "dessertspoonful" in a sentence
"I used a dessertspoonful size and the biscuits were cooked perfectly at 15 minutes baking time."
"Add a generous dessertspoonful of tomato paste and a large can of chopped tomatoes or a jar of passata."
"Marinade for the salmon: a dessertspoonful of seed mustard, the juice of a good-sized orange, a generous splash of tamari, a teaspoonful of honey and a couple of drops of sesame oil."