• Preheat oven to 325 degrees F. Spray a 9-inch square baking pan with cooking spray and line it with parchment paper, extending it up and over the sides for easy removal.

To make the blondies:

• In a small saucepan, combine the butter and brown sugar and warm the mixture, stirring often, until melted and smooth. Using a rubber spatula, scrape this mixture into a large bowl and let cool.
• In a small bowl, whisk together the flour, baking powder, and salt.
• Add the eggs and vanilla to the cooled butter mixture and mix with a large spoon until smooth.
• Add the flour mixture and stir just until combined.
• Pour the batter into the prepared pan.
• Bake for 20-25 minutes or until a toothpick inserted in the centre comes out clean. Let cool completely.

To make the glaze:

• Combine the butter, brown sugar, and cream in a sauce pan over medium heat and warm the mixture, stirring until melted.
• Raise the heat to medium-high and let the mixture boil undisturbed for 2 minutes.
• Remove from the heat, stir in the vanilla, and let cool.
• Stir in the powdered sugar.
• Spread (or pour) the glaze evenly over the blondies.
• Allow to set completely in the fridge for at least 1 hour.