"Captain Tootsie and the Giant Cannon," from World's Finest Comics #17 (Spring 1945), by Rod Reed and C. C. Beck
The ad promises that a Tootsie Roll will give you enough energy to ride a bicycle THREE MILES downhill, on Jupiter. If that's the case, then how many Tootsie Rolls did Superman, on the cover of that self-same issue of World's Finest, to do this:
Cover of World's Finest Comics #17, pencils by Jack Burnley, inks by Charles Paris
Superman: putting rickshaw drivers out of work since 1945.
And just for fun, here's a shortened version of the same Captain Tootsie adventure (printed one ish earlier, no less!), featuring Cap's crime-fightin' buddy Dick Tracy and Tootsie in a Jar!
Tootsie VM ad from World's Finest Comics #16 (Winter 1945)
You can see a close(r)-up of the items you'd find in a Dick Tracy Detective Kit here, but I can't find any pictures of a jar of Tootsie's answer to Ovaltine, Tootsie VM. Anybody still got some in their cupboard? I'll test it out for ya!