This vintage ad has a photo of something called "Sugar-Frosted Dainties." To get the recipe, one would have had to write to Knox for the recipe and I didn't do that because, well, I was born before this ad ran.
However, I recently found a neat little recipe that makes homemade gum drops that look just like the Sugar-Frosted Dainties.
The recipe is very easy and the results are a delight. I'm making lots and lots of them as Chrsitmas gifts this year.
Homemade Gum Drops
1 cup granulated sugar
3/4 cup apple juice
1 package Jell-o Gelatin, 4 serving size-color of your choice
1 envelope unflavored gelatin
1/2 teaspoon lemon juice
extra sugar for rolling
Coat a Loaf pan with cooking spray. You can also use an 8x8 pan, though the gumdrops will be thinner. Place pan in refrigerator until ready to use.
Combine all ingredients in a medium sauce pan, let sit for 1 minute. Bring to a boil over medium heat, stirring constantly. Once you reach a steady boil, continue to boil for 1 full minute. Pour into chilled pan and return to refrigerator for 3-4 hours.
Once gelatin is set, run knife around edges to loosen. Using a spatula, remove gumdrop slab to wax paper and cut into desired shapes using a sharp knife. If knife starts to get sticky, run under hot water. Transfer cut gumdrops to a tray lined with fresh wax paper to dry at room temperature for at least 10 hours, preferably overnight. I placed my tray in the cold oven to dry. Roll gumdrops in granulated sugar and store in airtight container.
If you want to go vintage all the way, you can put your homemade gum drops into a milkglass candy dish, like this one.