Typically, any kind of apples used in recipes are not those often snacked on. They are more tart and firm than sweet apples. However, this isn’t typically the case for apple butter. Sweeter and softer apple varieties are often used to make sugary apple butter. Feel free to use your favorite apples. I like to use Fuji and Honeycrisp. Some other suitable apples for the best flavor in this Instant Pot Apple Butter recipe are Granny Smith apples, Gala, Pink Lady, Golden Delicious, Jonagold and Red Delicious apples.