Preheat the oven

• Preheat the oven to 180 °C.
• Line a square baking dish with baking paper.

Mix the wet ingredients

• In a bowl, whisk the sugar, eggs and oil until smooth and slightly pale.

Add the dry ingredients

• Add the flour and baking powder and stir until just combined.
• Fold in most of the M&Ms.

Bake the blondies

• Spread the batter in the baking dish and scatter the remaining M&Ms on top.
• Bake until the edges are golden and a skewer comes out with a few moist crumbs.

Cool and cut

• Let the blondies cool completely in the dish.
• Cut into bars and serve.