Buy OSRS Summer pie
The summer pie is a food item in Old School RuneScape. It has two bites. Each bite restores 11 Hitpoints, gives back 10% run energy, and boosts your Agility level by 5. An empty pie dish is left when you finish it.
Summer pies count as fast food. You can eat them one after another with less delay than normal food. This lets you heal a lot of health faster than food like manta rays. Each bite does add a short attack delay, so plan around that in combat.
The +5 Agility boost is the big draw. It helps you pass course obstacles more often and heals the damage from failing them. You can also use the boost to meet Agility levels for quests, shortcuts, and other activities, though some requirements cannot be boosted. The Preserve prayer can make the boost last longer.
Many players bring summer pies when fighting the Chaos Elemental or Chaos Fanatic. The empty pie dish keeps your inventory full, which stops their special attacks from removing your worn gear.
Baking one yourself takes level 95 Cooking, so a ready-made summer pie saves a lot of work. It is a members only item.