Preheat the oven to 350F(180C).
In a bowl, whisk the eggs and sugars until foamy, about 30-40 seconds.
2 eggs, 100 grams granulated sugar, 50 grams granulated brown sugar
Add the yogurt, milk, oil, vanilla, poppy seeds, and melted butter to the egg/sugar mixture and whisk until combined.
100 grams yogurt, or sour cream, 60 ml milk, 50 ml grapeseed oil, 2 teaspoons vanilla extract, 1 tablespoon poppy seeds, 56 grams butter, melted
In another bowl, whisk the flour, baking soda, baking powder, and salt.
260 grams all-purpose flour, 1 teaspoon baking soda, ½ teaspoon baking powder, ½ teaspoon salt
Add the dry to the wet mixture and fold until no dry flour remains.
Fold in the chopped chocolate.
100 grams white chocolate, chopped
Line a baking dish with parchment paper.
Transfer the batter to the baking dish.
Bake for 50 minutes, or until a toothpick inserted into the center comes out clean. If the top starts to brown too much before the center is cooked, loosely place a piece of foil on top.