Step-by-Step Instructions

• Melt the Butter: In a microwave-safe bowl, melt 1 ¼ cups of butter for about 30 seconds until completely liquid.
• Combine Dry Ingredients: In a large bowl, combine melted butter, 1 ½ cups of quick oats, 2 ¼ cups of all-purpose flour, and 1 ½ cups of brown sugar.
• Press the Crust Mixture: Press two-thirds of the crust mixture into the bottom of a greased 9x13 inch pan.
• Prepare the Caramel Filling: In a saucepan, melt ¼ cup of butter over medium heat, stirring continuously until it bubbles.
• Mix in Brown Sugar: Stir in 1 cup of brown sugar until completely smooth.
• Add Milk and Flour: Gradually add ¼ cup of milk, stirring, then incorporate 2 teaspoons of vanilla extract and 2 tablespoons of flour.
• Simmer the Caramel: Bring the mixture to a gentle boil and simmer for about 3 minutes, until it thickens.
• Assemble the Bars: Pour the caramel filling evenly over the cooled crust.
• Add the Crust Topping: Sprinkle the reserved crust mixture over the caramel filling.
• Bake to Perfection: Bake at 300°F for 20 minutes, looking for a golden hue on top.
• Cut and Serve: Once cooled, slice into bars and serve at room temperature.