Mexican Key Lime Tartlets with Cream Cheese Pastry are a perfect end to your Cinco de Mayo feast. Their awesome blend of tart and sweet will have you clamoring for more of these delectable bite-sized morsels. What’s even better is that the shells and the key lime mixture can be made ahead of time, and assembled right before serving.
Although one often associates key limes with the Florida Keys, most are grown in Mexico and Central America. Key limes are different than the more common Persian limes that you find in grocery stores in several respects. First, they are significantly smaller than the Persian limes. Second, their skins tend to be thinner. Finally their juice is much more tart. Because they are so small, juicing key limes is a bit of a chore. In fact, I wouldn’t even think about using key limes without an electric juicer!
Ingredients for Mexican Key Lime Tartlets:
I used the following ingredients for the cream cheese pastry: Cream cheese, unsalted butter, and all purpose flour. For the filling, I used eggs yolks, sweetened condensed milk, and key lime juice. Finally, I used whipping cream sweetened with confectioners sugar for the tartlet topping.
Making the Cream Cheese Pastry:
I started by beating together the cream cheese and butter on high until it was light and fluffy. Then, I added the flour, and beat the mixture on low just until it came together. It didn’t matter at all that the dough was crumbly. Being the foodie nerd that I am, I weighed the dough so that I could determine how much the dough for each of the tartlet shells should weigh. With a total of 293 grams and 24 shells, the result was 12.2 grams of dough for each shell!
After weighing the dough, I formed each piece into a ball, and pressed it into the cup of my mini-muffin pan. Then, I used my tart tamper to press the dough into the shell shape. I finished shaping each shell with my fingers. Before baking the shells, I chilled them for about 30 minutes.
After pricking each of the shells with a fork, I popped them into a preheated 400° F oven. After about 12 minutes, the shells were golden brown. I removed them from the oven, and let them cool in the pan for about 10 minutes. Then, I removed the shells from the pan, and let them cool completely on a wire rack. I stored the cooled shells in a ziploc bag until I was ready to fill them.
Making the Key Lime Mixture:
I started by beating two egg yolks on medium speed until they were thick and lemon colored. This took about 4 minutes.
Then, I heated the key lime juice in a saucepan over medium heat until it was hot. Next, I slowly poured about a fourth of the hot juice into the eggs, stirring constantly. This tempered the eggs so that I wouldn’t end up with scramble eggs! I whisked the tempered egg mixture into the remaining lime juice. Then, I cooked it, stirring constantly over medium heat until it had thickened. This took about 2 minutes. I removed it from the heat, and let the mixture cool for about ten minutes. Then, I added the sweetened condensed milk and lime zest, and whisked to ensure that everything was well combined. After the mixture had cooled a bit, I transferred it to a small bowl, pressed a piece of plastic wrap on top, and refrigerated it.
Putting the Tartlets Together:
First, I made some whipped cream by beating the cream on high until it thickened. Then, I added some confectioners’ sugar, and continued beating until it reached the proper consistency. I transferred the whipped cream to a pastry bag fitted with a #21 star tip.
I filled each of the pastry shells with the key lime mixture, and pipped whipped cream on top.
I garnished each of the Mexican Key Lime Tartlets with a small piece of key lime. They were absolutely delicious. Each little morsel had the perfect blend of tart and sweet, making it the perfect ending to the perfect Cinco de Mayo feast. Yum!