INGREDIENTS
Vegetable-oil cooking spray
3/4 cup
unbleached all-purpose flour
1/4 cup
whole-wheat flour
1/2 tsp
instant yeast, such as RapidRise
Coarse salt
2 tbsp
ground flaxseed, plus more for sprinkling (optional)
2/3 cup
plain Greek yogurt, room temperature, drained of excess water
2 tbsp
unsalted butter, melted
3
large eggs plus 3 large egg yolks, room temperature
1 cup
plus 2 tablespoons granulated sugar
1 1/2 tsp
pure vanilla extract
1/2 cup
raspberries, plus more for garnish
2 tbsp
unsalted butter
1/4 cup
whole milk, plus more for thinning
1/2 tsp
pure vanilla extract
Coarse salt
2 1/2 cups
sifted confectioners' sugar