Step 1: Prepare the Pretzel Crust

1. Preheat your oven to 350°F (175°C). Line a 9×9-inch baking pan with parchment paper, leaving overhang on the sides.

2. In a bowl, combine crushed pretzels, melted butter, and brown sugar. Mix until the texture resembles wet sand.

3. Press the mixture firmly into the bottom of the prepared pan, using the back of a spoon or a measuring cup to flatten evenly.

4. Bake for 10 minutes. Remove from oven and let cool while you prepare the filling.

Step 2: Make the Peanut Butter Cheesecake Layer

1. In a large mixing bowl, beat the softened cream cheese until smooth.

2. Add sugar and peanut butter, and mix until well combined.

3. Beat in the eggs one at a time, scraping down the sides of the bowl as needed.

4. Stir in vanilla extract and sour cream until the mixture is creamy and uniform.

5. Pour the cheesecake filling over the cooled pretzel crust and spread evenly with a spatula.

Step 3: Bake the Cheesecake Bars

1. Bake at 350°F (175°C) for 25-30 minutes, or until the center is set but still slightly jiggly.

2. Remove from oven and cool to room temperature, then transfer to the fridge to chill for at least 4 hours (or overnight for best results).

Step 4: Add the Chocolate Ganache Topping

1. In a small saucepan, heat heavy cream over medium heat until just about to boil.

2. Remove from heat and pour over the chocolate chips in a heatproof bowl.

3. Let sit for 2-3 minutes, then stir until smooth and glossy.

4. Pour the ganache over the chilled cheesecake layer and spread evenly.

5. Top with crushed pretzels, peanut butter drizzle, or sea salt if desired.

6. Chill again for 30 minutes, or until the ganache is set.

Step 5: Slice and Serve

1. Lift the bars out of the pan using the parchment overhang.

2. Use a sharp knife to cut into squares or rectangles. Wipe the knife clean between cuts for tidy edges.

3. Serve chilled and enjoy the salty-sweet goodness in every bite.