First - gather all of your ingredients.

Next - melt the first 1/2 cup of salted butter. Then, put the pretzels in your food processor and blend until corse. Add the pretzels to the 1/2 cup of melted butter and add in the first 1/4 cup of white sugar.

Now, time for the cookie. Cream the sugars, butter, egg, and vanilla. In a different bowl mix together all of the dry ingredients. Now, slowly add in the dry ingredients into the cookie mix. Mix well.

Take out a square 8x8 pan and line it with parchment paper. Push the pretzel crust into the bottom. Then, layer on 1/2 the cookie dough.

Time to cut the Mars bar. Cut each one in 4 lengthwise. Layer them on top of the cookie dough. Then, top with the remaining cookie dough. Bake at 350 degrees for 20-23 minutes.

Let them cool for about 1/2 an hour and then cut!