Every week, players battle through a set of stages which rewards the players Life Jewels, Sugar Crystals and other rewards. As these stages are themed around making use of the Crystal Jam's effects, the Cookie with a Crystal Jam is required to be placed in the team. The player is provided with the required Cookie with a full set of Searing Raspberry toppings, but the player may swap it for their own Cookie. There are a total of 10 stages which present Stages of increasing difficulty and growing rewards. Possessing the Crystal Jam of the featured Cookie will provide extra buffs to the Cookie and the allies, which scale with the level of the Crystal Jam.
Trial Grounds can be attempted seven times per week at default. Purchasing the Kingdom Pass will grant three additional attempts per week for a total of 10. The Trial Ground levels reset every week.
Whenever certain enemies use specific skills or get hit, the gauge will fill up. Once the gauge is full, Cookies will gain the Frozen status. Once the Frozen status wears off or is dispelled, the Cookie will take damage proportional to their Max HP. With each further repetition of this process, the damage will increase.