• Preheat oven to 350 Fahrenheit.
• Grease an 8 by 8 square pan with butter. Line all sides with parchment paper. Leave an overhang on at least two sides. Butter the parchment paper. Set aside.
• Melt 1/2 cup of the chocolate chips in the microwave, stirring every 15 seconds til melted. Set aside.
• Melt the butter in the microwave. Whisk the hot melted butter and sugar together for about 1 minute til smooth. Add the eggs and vanilla and whisk for 1 minute. 
• Whisk the condensed milk and melted chocolate into the mixture til just combined.
• Use a spatula to stir in the cocoa powder, salt and flour. Avoid overmixing. Stir in the remaining 1/2 cup chocolate chips til just combined.
• Pour mixture into the prepared pan. Sprinkle the chocolate chips on top. Bake 25- 30 minutes. Remove from oven and cool completely in pan. Once cooled, slice and enjoy or top with optional hot fudge sauce.

Hot Fudge Sauce

• Melt the butter and sweetened condensed milk in a medium sized saucepan over medium heat.
• Once the butter has melted, stir in the chocolate chips and stir constantly until the chocolate has melted. Remove from heat.
• Stir in the vanilla.
• Drizzle or spread the sauce over brownies while the sauce is still warm. Enjoy!