Preheat the oven to 170℃. Line a 2lb loaf tin with parchment
Combine the flour, baking powder and salt in a bowl and whisk together to combine. Set aside
Melt the butter and the stir in the yoghurt, brown sugar and vanilla. Stir in the flour mixture and then most of the pretzels and chocolate chips
Transfer to the lined tin and add the extra pretzels and chocolate chips on top
Bake for 15-20 minutes until golden brown and the edges have started to pull away from the pan. Leave to fully cool before cutting into squares.