Preheat Oven: Set it to 425°F.
Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, baking soda, salt, and sugar.
Combine Wet Ingredients: In another bowl, mix the Greek yogurt, eggs, oil, milk, and vanilla extract until well combined.
Combine Mixtures: Pour the wet ingredients into the dry ingredients and mix until just combined. The batter should still have some dry spots.
Add Raspberries and Chocolate: Gently fold in the raspberries and white chocolate chips.
Rest the Batter (Optional): Cover the bowl with a towel and let the batter rest for 30 minutes for taller muffins.
Fill Muffin Pan: Spoon the batter into a muffin pan lined with cupcake papers. Top with extra white chocolate if desired.