In a large bowl, whisk together 250 grams plain flour, 3 ½ teaspoons baking powder, 80 grams white sugar, and ½ teaspoon fine salt.
In another bowl, add 200 grams yoghurt, 100 millilitres oil, 50 millilitres milk, 2 eggs, ¼ teaspoon vanilla extract, and ½ lemon, zest only. Whisk to combine.
Add the dry ingredients to the wet batter. Stir the mixture with a spoon or spatula until very few streaks of flour remain. Do not overmix.
Add 132 grams strawberries (chopped) and 52 grams white chocolate chips. Gently stir through.
Line a muffin tin with cases. Spoon the batter into the cases.
Top each muffin with the remaining 66 grams strawberries (chopped) and 26 grams white chocolate chips. Then sprinkle over 2 tablespoons coarse brown sugar.
Bake the strawberry white chocolate muffins for around 30 minutes. Check on the muffins at 20-25 minutes, as ovens vary. They're done with a skewer comes out clean (not wet) and the tops are golden.
Cool for 10 minutes in the tin, then finish cooling on a wire rack.
Notes
For the best results, I recommend removing the eggs and yoghurt from your fridge 30 minutes before baking, so they're at room temperature when you mix the muffin batter. I strongly advise using a kitchen scale and metric measures when baking. Cups aren't accurate enough for successful, consistent baking.