Preheat oven to 350.
In food processor, add sleeve of graham crackers and brown sugar. Pulse until mixture is fine crumbs.
Add melted unsalted butter to graham crackers, mix well.
Pour graham cracker mixture into pie dish. Press evenly around and up all sides. Pro Tip: Using the bottom of a glass can ensure even thickness.
Bake in oven 10 minutes until crust is set. Remove, cool completely.
In bowl, whisk egg yolks, condensed milk, lime juice, lime zest, and a pinch of salt. Whisk until smooth.
Pour filling into cooled pie crust and transfer to 350 degree oven.
Immediately turn heat down to 325 and bake for 25 minutes until set around the edges.
Allow to cool to room temperature, then cool in the fridge until firm, at least 5 to 6 hours or overnight.
Garnish with whipped cream and lime slices. Enjoy!