This is the only recipe I found that mentions Sugar Daddy's. At least this gives you some idea of where to go with the recipe.

Halyna

CREAMY CARAMELS
(OR HARDENED TO SUGAR DADDIES)

1 cup sugar
1 cup dark corn syrup
1 cup butter or margarine
1 can (14 ounces) sweetened condensed milk
1 teaspoon vanilla extract

Line an 8 inch square pan with foil and butter the foil; set aside.

Combine sugar, corn syrup and butter in a 3 quart saucepan. Bring to a boil over medium heat, stirring constantly. Boil slowly for 4 minutes without stirring.

Remove from the heat and stir in milk. Reduce heat to medium-low and cook, until candy thermometer reads 238 degrees (soft-ball stage), stirring constantly.

Remove from the heat and stir in vanilla. Pour into prepared pan. Cool.

Remove from pan and cut into 1-inch squares. Wrap individually in waxed paper; twist ends.

Notes:
I messed up one time I was making these (bad thermometer) and cooked them too long. I ended up with a very hard candy that I ended up breaking apart with a hammer. I was VERY pleased with my mistake because I had just made something that tasted exactly like the old Sugar Daddy candy. So whether these turn out to be the most soft, delicious caramel that has ever passed your lips, or
a very hard candy, you will not be tossing these out.

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and the BESLEY one-name-study from Joyce