For the record, this took longer than I anticipated and was a little difficult with as many steps as it has. Plus time it took! BUT, it was sooo good!
For the Crust:
1 cup all-purpose flour
¼ cup sugar
¼ tsp salt
1 stick , cut into small pieces and chilled
1 large egg yolk, lightly beaten
For the Filling:
½ cup sugar
3 TBSP water
1 ½ cups
About 1 ½ cups store-bought dulce de leche
For the Topping:
7 ounces bittersweet(I used semi since hubby doesn’t like bittersweet), coarsely chopped
½ stick unsalted butter, cut into 8 pieces, at room temperature
Preheat oven to 350F. Butter a 8 inch square pan and put it on a baking sheet.
To Make the Crust:
Toss the flour, sugar, powdered sugar and salt into a food processor and pulse a few times to combine. Toss in the pieces of cold butter and pulse about 12 times, until the mixture looks like coarse meal. Pour the yolk over the ingredients and pulse until the dough forms clumps and curds-stop before the dough comes together in a ball.
Turn the dough into the buttered pan and gently press it evenly across the bottom of the pan. Prick the dough with a fork and slide the sheet into the oven.
Bake the crust for 15-20 minutes, or until it takes on just a little color around the edges. Transfer the pan to a rack and cool to room temperature before filling.
To Make the Filling:
Have a parchment or silicone mat-lined baking sheet at the ready, as well as a long-handled wooden spoon and a medium heavy bottomed saucepan.
Put the sugar and water in the saucepan and cook over medium-high heat, stirring, until the sugar dissolves. Keeping the heat fairly high, continue to cook the sugar, without stirring, until it just starts to color. Toss the peanuts and immediately start stirring. Keep stirring, to coat the peanuts with sugar. Within a few minutes, they will be covered with sugar and turn white¢â¬â€keep stirring until the sugar turns back into caramel. When the peanuts are coated with a nice deep amber caramel, remove the pan from the heat and turn the nuts out onto the baking sheet., using the wooden spoon to spread them out as best you can. Cool the nuts to room temperature.
When they are cool enough to handle, separate the nuts or break them into small pieces. Divide the nuts in half. Keep half of the nuts whole or in biggish pieces for the filling, and finely chop the other half for the topping(I kept mine whole).
Spread the over the shortbread base and sprinkle over the whole .
Melt the chocolate in a heatproof bowl set over a saucepan of barely simmering water. Remove chocolate from the heat and gently stir in the butter, stirring until it is fully blended into the chocolate.
Pour the chocolate over the dulce de leche, smoothing it with a long metal icing spatula, then sprinkle over the rest of the peanuts. Slide the pan into the fridge to set the topping, about 20 minutes; if you’d like to serve the squares cold, keep them refrigerated for at least 3 hours before cutting.
Cut into 16 bars.
Source: Adapted from Baking: From My Home to Yours by Dorie Greenspan