To make candy corn-infused vodka, mix vodka and candy corn in jar; seal tightly. Let stand at least 4 hours.
Strain vodka to remove candy.
For each serving, in chilled cocktail shaker, place 1/2 cup infused vodka and 1/4 cup pineapple juice; add ice. Shake; pour into martini glass. If desired, garnish each glass with additional candy corn.