Chocolate Chip and Walnut Cookies

Name: Chocolate Chip and Walnut Cookies
Prep time: 15 min
Cook time: 45 min
Total time: 45 min
Yield: 12 pieces
Ingredients: 230 g unsalted butter; 135 g brown sugar; 100 g caster sugar; 2 medium eggs; 10 g natural vanilla extract; 210 g plain flour; 120 g self-raising flour; 1 tsp bicarbonate of soda; ½ tsp fine sea salt; 340 g chocolate chips; 200 g walnut halves