Powsicle Drizzle is a holiday-exclusive topping in Papa's Donuteria Deluxe Edition!. It's unlocked on Day 2 Day 4 (Donuteria) of Starlight Jubilee.
Powsicle Syrup is a syrup in Papa's Freezeria Deluxe Edition!. It is unlocked in both games with Boomer. The sticker "Summertime Treat" is earned when you serve 30 sundaes with this syrup.