These dulce de leche bars feature a buttery oat crust, a rich dulce de leche filling, and a crumbly toffee topping. They’re simple to make with pantry staples, yet they taste like something special. Perfect for sharing at gatherings or keeping on hand for an anytime treat.
Preheat oven to 350°F (175°C). Line a 9" x 13" baking pan with parchment paper.
In a large bowl, combine flour, oats, brown sugar and salt. Using a pastry blender or fork, cut in butter until mixture is crumbly. Reserve 1/4 of crumb mixture for topping. Press the remaining crumb mixture into the bottom of the prepared pan. Bake 10 minutes.
In a small saucepan, heat dulce de leche over low heat for 3-4 minutes, stirring frequently, to soften slightly.
Spread the dulce de leche over crust. Sprinkle evenly with toffee bits. Then, sprinkle with remaining crumb mixture.
Bake 25-30 minutes or until golden brown. Cool 15 minutes.
Run a knife around sides of pan to loosen bars. Allow to cool completely before cutting into bars.