For the brownie layer: add walnuts, almonds, pitted medjool dates, cocoa powder, vanilla extract, and salt to a food processor. Pulse until a sticky brownie dough is formed.
Line a square baking dish with parchment paper. Use hands/spatula to press the dough across the base of the dish.
For the caramel layer: add pitted medjool dates, vanilla extract, salt, and water as needed to a food processor. Pulse until a smooth spread is formed.
Spread the caramel across the brownie layer. Then, add crushed pecans on top. Next, add mini chocolate chips on top. Gently press them over the pecans.
Freeze the turtle brownies for 1 hour. After, slice and serve.