Preheat & Prepare: Preheat your oven to 350°F (175°C) and line a 9x13 baking pan with parchment paper.
Mix the Batter: Start by melting your butter in the microwave on High for 1 minute. Pour the butter into a large mixing bowl and add the sugar. Using an electric mixer, beat the sugar and butter together for 1 minute. Add in your cocoa, espresso powder, eggs and vanilla and mix well for 1 minute.
Dry Ingredients: Add in your flour, baking powder and salt and beat until just mixed. Fold in half of the pecans and half of the chocolate chips.
Caramel Sauce: In a small saucepan add unwrapped caramel candies and evaporated milk over medium heat. Gently stir together until completely melted. Remove from stove and set aside.
Layer & Swirl: Scoop half of the batter into your baking pan (batter will be super thick) and even out batter with the back of a spoon. Drizzle caramel sauce, sprinkle half of your remaining pecans and half of your remaining chocolate chips.
Top Brownie Layer: Grab off chunks of the remaining brownie batter and place them on top of the caramel layer to make a complete top layer. It doesn't need to be perfect, just full and even. Top with remaining pecans... not the chocolate chips though.. hold on to those!
Bake & Cool: Bake for 30 minutes. Remove from oven and sprinkle with remaining chocolate chips. Let cool completely on a cooling rack before removing them from the pan and slicing. Your turtle brownies can then be moved to an airtight container and stored on your counter top.