the.com/ice cream sundae

means A dish of ice cream dressed up with toppings like syrup, nuts, whipped cream, and a cherry, served as one indulgent composite dessert.

from Genuinely murky. The leading theory ties it to American 'blue laws' of the late 1800s that restricted selling soda-fountain treats with carbonated soda on Sundays — so druggists sold ice cream with syrup but no fizz as a workaround, calling it a 'Sunday soda.' The spelling drifted to 'sundae,' possibly to avoid seeming to name a dessert after the Sabbath, or just to make it look special on a menu. Several American towns still argue over who invented it first, and no single claim is proven — the dish's popularity spread faster than its paper trail.