Preheat the oven to 375 degrees Fahrenheit.

Line a baking sheet with parchment paper or a silicone mat.

In a large bowl, add the butter, brown sugar, white sugar, eggs, and vanilla extract. Mix until combined thoroughly.

In a separate bowl, mix flour, baking soda, and salt.

Add the syrup and walnuts to the mix and combine thoroughly.

Add the dry ingredients to the wet ingredients and mix to form a dough.

Using a melon baller, scoop the cookie dough onto a cookie sheet about 2 inches apart.

Bake for 12 minutes.

Let cool for 5 minutes.