Preheat the oven to 350°F (175°C).

Grease your 9x9 inch baking pan or line it with parchment paper.

In a mixing bowl, whisk together the melted butter and brown sugar until well combined.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

In another bowl, mix together the gluten-free flour, baking powder, and salt.

Gradually add the dry mixture to the wet ingredients, stirring until just combined.

If using, gently fold in the chocolate chips.

Pour the batter into the prepared pan and spread it evenly.

Bake in the preheated oven for 25 minutes or until the edges are golden and a toothpick comes out clean.

Let the blondies cool completely in the pan before cutting.