RS Anniversary cake only appears during events and may not be currently found in game.

The RS Anniversary cake was originally obtained as 15th Anniversary cake by celebrating at the 15 Year Anniversary Celebrations. It was removed from the game on 1 February 2016. It made its return on 4 January 2018, where it was automatically placed in the player's inventory upon login. It can be eaten every 3 minutes to replenish a maximum of 2,200 life points at level 88 Constitution, same as a cavefish. This scaled according to the player's level.

Calculator Enter your Constitution level name=skillstat_Constitution_level|type=int|value=1|range=9,99|size=4|sublist=calchealing name=healing|type=output variables=skillstat_Constitution_level calchealing| let(minLevel, 88) let(healAmount, 0) let(healAmountOutOfCombat, 0) let(healOverTimeAmount, 0) let(healOverTimeDuration, 0) let(constitutionLevel, skillstat_Constitution_level) let(pointsPerLevel, 25) if(healAmount){ let(pointsPerLevel, healAmount / minLevel) } if(constitutionLevel < minLevel){ let(heal, constitutionLevel * pointsPerLevel) }{ let(heal, minLevel * pointsPerLevel) } let(heal, floor(heal + 0.000001)) let(healing,"This will heal " + heal + " life points at level " + constitutionLevel + " in combat.") if(healOverTimeAmount){ let(healing, healing + " It will heal an additional " + healOverTimeAmount + " life points over " + healOverTimeDuration + " seconds.") } if(healAmountOutOfCombat){ let(pointsPerLevelOutOfCombat, healAmountOutOfCombat / minLevel) if (constitutionLevel < minLevel){ let(healOutOfCombat, constitutionLevel * pointsPerLevelOutOfCombat) }{ let(healOutOfCombat, minLevel * pointsPerLevelOutOfCombat) } let(healOutOfCombat, floor(healOutOfCombat + 0.000001)) let(healing, healing + " It will heal " + healOutOfCombat + " life points while out of combat.") } The minimum Constitution level to receive the full amount of healing from this food is 88.

Eating the cake prompts the following messages:

You eat the delicious cake and it magically reappears.

It restores some life points.The cake cannot be used again for 3 minutes.

Eating the cake before 3 minutes has passed from its last usage will result in the message:

The cake hasn't yet reconstituted itself. You need to wait <amount of time remaining>.

Attempting to eat the cake while at full health will result in the message:

You are already at full health. The cake refuses to be eaten.

After 3 minutes has passed since the cake's last usage, the following message will be shown:

Your 15th[sic] Anniversary cake is ready to be used again.

In its re-release, the RS Anniversary cake remained usable for one week. Attempting to eat it after the start of 12 January prompts the following message:

The Anniversary cake may only be used for one week from January 4th.

Trivia