Blondies

Preheat the oven to 350F degrees. Line a 9x13 inch (23x33 cm) pan with parchment paper, or aluminum foil, so that there's another overhang around the edges. Alternatively, lightly grease the pan.

In a large bowl, whisk together the melted butter and sugars.

Whisk in the eggs and vanilla extract. You don't want the butter to look like it's melting out at this point.

Stir in the flour, cornstarch and salt, ensuring that there are no flour clumps.

Fold in the chocolate chips/mix-ins.

Spoon the batter into the prepared pan and smooth the top.

Bake in the preheated oven for 24-28 minutes, or until the top looks set and shiny and an inserted toothpick comes out clean or with a few damp crumbs.

When ready to slice, lift the bars out of the pan using the overhang of the pan and place on a cutting board. Peel back the paper (or foil), then slice with a sharp knife. If you greased the pan, then simply slice the bars in the pan. For clean cuts, ensures that the bars are fully cooled first. I cooled mine for about 2 hours, and the chocolate chips were still melty.