Step 1: Preheat the Oven

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare Baking Pan: Grease or line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy removal.

Step 2: Make the Blondie Batter

1. Mix Wet Ingredients: In a large mixing bowl, combine the melted butter, brown sugar, and granulated sugar. Whisk until smooth.
2. Add Egg and Vanilla: Add the egg and vanilla extract, mixing until well combined.
3. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, and salt.
4. Mix Dry into Wet: Gradually add the dry ingredients to the wet mixture, stirring until just combined. Be careful not to overmix.
5. Fold in Add-ins: Gently fold in the white chocolate chips and dried cranberries until evenly distributed.

Step 3: Bake the Blondies

1. Spread Batter: Pour the batter into the prepared baking pan, spreading it evenly with a spatula.
2. Bake: Bake in the preheated oven for 25-30 minutes, or until the edges are golden and a toothpick inserted in the center comes out with a few moist crumbs.

Step 4: Cool and Serve

1. Cool: Allow the blondies to cool in the pan for about 10 minutes, then lift them out using the parchment paper and let them cool completely on a wire rack.
2. Slice and Serve: Once cooled, slice into squares or rectangles and serve. Enjoy!