Here’s how to create these incredibly delicious Cinnamon Blondies step-by-step:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan or line it with parchment paper for easy removal.

2. Mix Butter and Sugar: In a medium bowl, combine the melted butter and brown sugar, stirring until smooth.

3. Add Eggs and Vanilla: Beat in the eggs, one at a time, followed by the vanilla extract, until fully incorporated.

4. Combine Dry Ingredients: In another bowl, whisk together the flour, baking powder, baking soda, ground cinnamon, and salt.

5. Incorporate Dry Mixture: Gradually add the dry ingredients into the wet ingredients, mixing just until combined. Avoid overmixing.

6. Add Mix-ins: If desired, fold in the white chocolate chips or nuts for added flavor and texture.

7. Spread Batter: Spread the batter evenly into the prepared baking pan, smoothing the top with a spatula.

8. Bake: Place your pan in the preheated oven and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.

9. Cool: Once baked, remove from the oven and allow the blondies to cool in the pan for about 15-20 minutes before slicing.

10. Slice and Enjoy: Cut into squares and enjoy your fresh, warm Cinnamon Blondies!