Preheat the oven to 350F.
Cream together the softened salted butter with the white granulated sugar and the brown sugar.
Add the vanilla extract and whole egg, and whisk together until completely combined.
Add the kosher salt, baking soda, and all-purpose flour and mix until the flour is almost fully incorporated into the sugar, butter, and egg mixture.
If the cookie dough feels like it has too much moisture for your liking, add another tablespoon or two of all-purpose flour.
Make sure your chocolate chips, almonds, and pecans are very finely minced, as this will help to ensure the cookies spread out and bake evenly in the oven.
Stir the finely-minced chocolate and nuts into the cookie dough until evenly distributed.
*Try to avoid overmixing the cookie dough batter while you incorporate the chocolate and nuts.
Place a piece of parchment paper on a sheet tray.
Use a teaspoon to measure out evenly-sized teaspoons of batter distributed across the parchment paper.
*To ensure that the cookies are equal in size, press the cookie dough into the measuring teaspoon to fill it up completely, and scrape off any excess dough that goes beyond the top of the measuring spoon before placing the teaspoons of dough onto the parchment paper.
Very lightly wet your hands with water, and carefully shape the small teaspoons of dough into perfect circles, pressing them down lightly and shaping them until each cookie has the exact same height and size before being baked.
*If you prefer more rustic-looking ice cream sandwiches, don’t worry too much about this cookie-shaping step!
Bake the cookies in the oven at 350F for 5 minutes, or until the cookies have spread out to their final size and are still very soft in the center.
Quickly remove the cookies from the oven and press one whole pecan down into the center of each cookie.
*You could also use chocolate chips, or whatever you wanted here.
Return the cookies to the oven and bake for an additional 5-8 minutes, or until the cookies are fully cooked.
Remove the cookies from the oven and allow them to cool at room temperature.
When the cookies have completely cooled, carefully cover them with plastic wrap until you are ready to assemble your ice cream sandwiches.
Roughly 5-10 minutes before you are ready to assemble your ice cream sandwiches and serve dessert, remove your ice cream from the freezer.
When the ice cream has softened enough to scoop with relative ease, quickly assemble the ice cream sandwiches, placing a large scoop of ice cream between two cookies.
Gently press the cookies together to allow the scoop of ice cream to flatten out and more evenly fill the gap between the cookies.
Serve immediately and enjoy.