Plum Crumb Bars - The BakerMama

Ingredients

• 4 cups thinly sliced pitted plums (6-8 medium plums)
• 3 tablespoons Wondra® quick-mixing flour
• Juice of 1/2 lemon
• 3 cups all-purpose flour
• 1-1/2 cups old-fashioned oats
• 1-1/2 cups dark brown sugar
• 1 teaspoon baking soda
• 1/2 teaspoon cinnamon
• 1/2 teaspoon nutmeg
• 1/2 teaspoon salt
• 1 cup (2 sticks) cold unsalted butter
• 2 teaspoons vanilla