Sweet Alchemy Ice Creamery, or simply Sweet Alchemy, is an ice creamery based in Seattle, Washington. The business has shops in the University District and Ballard neighborhoods and on Capitol Hill. Owner Lois Ko opened the first location near the University of Washington in 2016. The Ballard location opened in 2019 and shares a space with Mighty-O Donuts, and the Capitol Hill shop opened in Chophouse Row in 2020. Sweet Alchemy offers a variety of ice cream and other desserts, and makes cakes, cones, cookies, and toppings in-house. The business pasteurizes its dairy from local farms daily. It has garnered a positive reception and is considered among Seattle's best ice cream shops.