Brigadeiro

Ingredients

• 1 (14-ounce can) sweetened condensed milk
• 1 tablespoon unsalted butter
• Pinch of salt 
• 2 tablespoons, plus 1 ½ teaspoons, unsweetened cocoa powder

For the decorating:

• Cooking spray or a 1 teaspoon of softened unsalted butter, for hands
• Handful of potato chips, crushed
• Handful of pretzels, crushed 
• 10 pistachios, finely chopped
• 10 walnuts, finely chopped
• 2 tablespoons chocolate sprinkles 

Instructions

1. 1
   Lightly grease a medium-sized bowl with cooking spray. Set aside. 
2. 2
   In a medium saucepan, set over medium-low heat, add the sweetened condensed milk, unsalted butter and salt. Sift in the cocoa powder as to avoid lumps; mix until thoroughly combined.  
3. 3
   Stir continuously for about 10 to 15 minutes, until the mixture has thickened. A good test is to swipe a spatula through the mixture and if it's thick enough to separate so you can see the bottom of the pan, then it's good to go. Pour the mixture into the lightly greased bowl. Cover with plastic wrap and transfer to the fridge to chill for at least 3 hours or overnight. 
4. 4
   Prep your decorating ingredients. On a large plate or cutting board, arrange the mounds of crushed potato chips, pretzels, chopped pistachios, walnuts and sprinkles. Lightly grease your hands with cooking spray or butter. Using a teaspoon, scoop out about a teaspoon of the chocolate mixture and roll it, on your palms, into a 1 1/2-inch ball and place inside of a small cupcake liner. Roll the ball in the sprinkle, nuts, pretzels or potato chips. Repeat the rolling and decorating process until you've worked your way through all of the chocolate mixture, spraying your hands with cooking spray every so often. 
5. 5
   Transfer the brigadeiros onto a cutting board or plate and place in the refrigerator until you're ready to serve.