sundae ingredients are typically small and can be taken in manageable bites for a mouthful of flavor.
The effect is like eating a sundae and some bacon, not a bacon sundae.
One less Democrat in the Senate would make for a nice little cherry on their sundae.
The sundae is meant to be a delectable marriage of textures: squishy and crunchy.
After the second sundae all around had been disposed of the society settled down to business.
A George Washington sundae, please, with plenty of ‘sundae’ on it.
They went into the drug store on the corner and had a sundae apiece.
Now take the lady outside, smooth her off and regale her with a lovers' sundae.
They divide their time between examining the mahogany victrolae and deciding what kind of sundae they will have for lunch.
There wasn't any use trying to melt a sundae with it, anyhow.
1897, American English, thought to be an alteration of Sunday, perhaps re-spelled in deference to religious feelings; but the reason for the name is uncertain; perhaps "ice cream left over from Sunday, on sale later." For a fuller account of the speculations, see H.L. Mencken, "The American Language," Supplement I (1945), pp.376-7.