Step 1

Preheat the oven to 350 degrees F (175 degrees C). Grease an 8x4-inch loaf pan. Line with parchment paper, leaving a 2-inch overhang on all sides.

Step 2

Whisk flour, baking powder, and salt together in a medium mixing bowl.

Step 3

Whisk sugar, eggs, oil, and vanilla extract together in another bowl until well combined. Whisk in the sour cream.

Step 4

Pour the sour cream mixture over the flour mixture; mix together with a rubber spatula. Fold in 1 cup crushed cookies. Pour batter into the prepared pan.

Step 5

Bake in the preheated oven until a toothpick inserted into the center comes out clean, 40 to 50 minutes. Immediately top with white chocolate chips and remaining crushed cookies.

Step 6

Lift loaf out of the pan using the parchment paper overhang. Allow to cool before dusting with powdered sugar.