Millionaires Shortbread

I saw this today on 5 Ingredient Fix and want to make sure I know to find the recipe when I'm ready to make this -- DH requests!

• Ready In: 30 mins
• Yields: 24-36 bars

Ingredients

• Shortbread

• 1  cup butter, cut into small pieces, plus more for preparing pans
• 2  cups all-purpose flour, plus more for preparing pans
• 2⁄3 cup sugar
• 1⁄2 teaspoon salt

• Caramel Layer

• 2 (14 ounce) cans sweetened condensed milk
• 2  tablespoons butter

• Chocolate Topping

• 3⁄4 lb  good-quality  milk chocolate

Directions

1. Shortbread:
2. Preheat the oven to 350 degrees F.
3. Prepare 2 (8-inch) square non-stick pans with butter and coat with flour, tapping off excess. Place the flour, sugar and salt in a food processor and pulse once. Add butter and pulse until mixture resembles peas. Press the shortbread mixture into prepared pans and bake until golden brown around the edges, about 20 minutes. Remove from the oven to cool completely.
4. Caramel Layer:
5. In a heavy-bottomed sauce pan over medium-low heat, combine the condensed milk and 2 tablespoons of butter. Slowly bring the mixture to a boil, stirring continuously. Continue stirring over the heat until mixture becomes thick and amber in color, about 15 minutes. Pour the caramel over the cooked shortbread and spread evenly using an offset spatula. Cool to room temperature.
6. Chocolate Topping:
7. In a glass bowl set over a saucepan of simmering water, melt the chocolate. Once chocolate has melted, pour it over the cooled caramel layer. Cool at room temperature for about 10 minutes, and then place in the refrigerator to cool completely allowing chocolate to slightly harden but not set hard.
8. Cut into 2 inch squares and enjoy, or store in an airtight container at room temperature or keep in the fridge for a yummy sweet and cool treat!