Cake infinite

In a town where an outbreak treathens, the lives of many was hanging in the balance. Custo and his friends were sent on a rescue mission in the mysterious cave of Gawu to extract a healing potion.
It is nicknamed the lethal cave by many for its treacherous death toll streak. The trials of getting in are substituted by deadlier ones when getting out.

"What if we don't find it?" Asks one of them.
"the worst would be not making it" adds another.
Nattering took over for a while and then...
"all that matters now is getting to Gawu with our goal in mind. Have you thought of what could go right?" says Custo as he strides forward across the bushes.
They all look at each other and walked on.

They bewield their way in but got trapped inside and would only make it out at a great cost. The dilemma of sacrificing one life for the rest or none will make it out alive.

Cusco, the likeliest warrior stepped up for the course. Fearlessly urging them to run as pebbles rapidly rain down on them. Having strived their way out, they only made it out with a limited quantity of the healing potion.
Sunk in melancholy it all felt like a loss.

Cusco reappears from the thick of the forest with a silver containment box. They bustle toward him with a bleak and suddenly spilled out their disappointed of the limited extraction.
With everyone peeking at the box labelled "cake infinite", Cusco acknowledged and proceeded in expounding his enigmatic escape as they journey home.

Explaining how he tangled around to a corner and saw the shiny box having urnlike vessels inside. Glancing the imagery description he mixed the ingredients, munched and swallowed it. A sudden loop emerged, he entered and it led him out.

Mixing the healing potion with cake infinite recipes happens to eradicate the outbreak. The whole town feasted for days and praised their heroes.
Inspired by their findings, Cusco opened a cake shop namely "infinite cake shop" with the cake infinite formula forming a special addition with the rest of the recipes.

Special thanks to readers and @mariannewest on behalf of the freewrite house for the dailyprompt
infinite cake shop