Double Berry Swirl Yogurt Loaf Cake

INGREDIENTS

1/2 cup

unsalted butter, room temperature, plus more for pan (or ½ cup neutral oil, like canola or coconut)

3 oz

blackberries (about a scant ¾ cup)

3 oz

raspberries (about a scant ¾ cup)

1 1/4 cups

plus 2 tablespoons sugar

1 1/2 cups

all-purpose flour

1/2 tsp

coarse salt

1/4 tsp

baking powder

large eggs, lightly beaten

1/2 tsp

pure vanilla extract

1/2 cup

Greek Yogurt, room temperature