In a pan, melt one cup of butter.
To the melted butter, add one cup of unsweetened cocoa powder and two cups of granulated sugar.
Mix the mixture until it's smooth and well combined. After taking the saucepan off the burner, allow it to cool slightly.
Add a teaspoon of vanilla extract and stir. Add 1 cup chopped nuts and 3 cups crushed graham crackers gradually.
Evenly press the mixture into a baking dish that has been lined. Place in the fridge to chill for a minimum of two hours.
Cut into squares once set, then savour your delicious no-bake brownies!