des ‧ sert ‧ spoon /dɪˈzɜːtspuːn $ -ˈzɜːrt-/ BrE AmE noun [countable] British English
1 . a spoon that is larger than a ↑ teaspoon but smaller than a ↑ tablespoon
2 . ( also dessertspoonful /-fʊl/) the amount that a dessertspoon can hold, used as a unit for measuring food or liquid in cooking
dessertspoon of
Add a dessertspoonful of dry mustard.