Oatmeal Raisin Breakfast Bars

1 1/2 cups old-fashioned rolled oats
3/4 cup all-purpose flour
3/4 cup whole-wheat flour
1 teaspoon ground cinnamon
3/4 teaspoon baking soda
1/2 teaspoon salt
2 large eggs
1 cup unsweetened applesauce
1/2 cup whole-milk plain strained (Greek-style) yogurt 
1/4 cup honey
1 teaspoon vanilla extract
1 cup raisins

Preheat oven to 350°F. Line bottom and sides of a 9-inch-square baking pan with parchment paper, leaving a 1-inch overhang on all sides. Lightly coat with cooking spray.

Whisk oats, all-purpose flour, whole-wheat flour, cinnamon, baking soda and salt together in a large bowl.

Whisk eggs, applesauce, yogurt, honey and vanilla together in a medium bowl until combined. Add the egg mixture to the flour mixture; stir until just combined. Fold in raisins until evenly distributed. Pour the batter into the prepared pan; smooth the top.

Bake until set and a wooden pick inserted in the center comes out clean, about 25 minutes. Let cool in the pan on a wire rack for 15 minutes.

Using the parchment overhangs as handles, remove the bars from the pan. Cut into 9 (2¾-inch-square) bars. Serve warm or at room temperature.