Valentine M&M's cookie bars

Ingredients

• 115 g unsalted butter, melted
• 167 g brown sugar (or half white, half brown)
• 1 large egg
• 1 tbsp vanilla
• 2 tbsp neutral oil
• 185 g flour
• 1/2 tsp baking soda
• 1/2 tsp salt
• 270 g chocolate chips (1 1/2 cups)
• Valentine M&M's
• Chocolate chunks

Instructions

1. Melt the butter and let it cool in a bowl.
2. Whisk in the brown sugar, egg and vanilla, then the oil.
3. Fold in the flour, baking soda and salt, then the chocolate chips and M&M's — don't overmix.
4. Spread in a lined pan, stud the top with chunks and extra M&M's.
5. Bake at 175°C (350°F) for 20–25 minutes, until golden with a soft center. Cool before slicing into bars.