Step 1: Preheat the Oven - Begin by preheating your oven to 350°F (175°C). This ensures that your brownies bake evenly and achieve that perfect fudgy texture.
Step 2: Prepare the Baking Pan - Line a 9x13-inch baking pan with parchment paper, leaving a little overhang on the sides. This will make it easier to lift the brownies out once they are baked and cooled.
Step 3: Melt the Chocolate and Butter - In a double boiler or a microwave-safe bowl, combine the chopped unsweetened chocolate and cubed unsalted butter. Melt them together until smooth, stirring occasionally to avoid burning. Once melted, set aside to cool slightly.
Step 4: Mix the Wet Ingredients - In a large mixing bowl, whisk together the sugar and eggs until well combined. Then, add the melted chocolate mixture along with the vanilla extract and salt. Stir until everything is incorporated.
Step 5: Add the Flour - Gently fold in the all-purpose flour until just combined. Be careful not to overmix, as this can lead to dense brownies.
Step 6: Incorporate the Twix Bars - Add the cut Twix bars to the brownie batter, folding them in gently to distribute evenly throughout the mixture.
Step 7: Bake the Brownies - Pour the brownie batter into the prepared baking pan and spread it out evenly. Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
Step 8: Make the Caramel Sauce - While the brownies are baking, prepare the caramel sauce. In a small saucepan over low heat, combine the individually wrapped caramel candies and heavy cream. Stir until the caramels have melted and the mixture is smooth. Remove from heat and let it cool slightly.
Step 9: Drizzle the Caramel - Once the brownies are out of the oven, allow them to cool for about 10 minutes. Drizzle the warm caramel sauce over the top of the brownies, spreading it out evenly with a spatula.
Step 10: Cool and Serve - Allow the brownies to cool completely in the pan on a wire rack. Once cooled, lift them out using the parchment paper and cut into squares. Serve and enjoy the indulgent flavors of your homemade Twix Brownies!