Dulce de leche-filled alfajores are the ultimate sandwich cookie

Becky Krystal

The Washington Post – Sandwich cookies are great. Two cookies plus filling, masquerading as a single treat? Sign me up.

That was especially the case when I was younger and devoted to Oreos (or those times I visited my grandpa, when Hydrox was in the house). Eventually I found out that the ubiquitous store-bought sweet was just the tip of the iceberg when it came to sandwich cookies. And there were plenty of superior examples. Linzer cookies. Macarons. Baci di dama. Whoopie pies. Alfajores.

The last are my most recent obsession, and not only because they’re the simplest of the bunch to make. Alfajores are an extremely effective vehicle for enjoying dulce de leche, the delectable, rich and golden spread of long-cooked milk and sugar that is a favourite ingredient in South America. It’s comparable to caramel, although in this case, the process relies a lot more on the Maillard reaction – the interaction between the dairy proteins and the sugar – than actual caramelisation. I could, and do, eat dulce de leche straight out of the can with a spoon, but an elegant cookie sandwich adds an extra layer of legitimacy.

Alfajores are a staple in South American dessert culture, often associated with Argentina but popular in other countries there as well. Camila Hurst, who blogs about baking at the delightfully named Pies and Tacos, grew up in Brazil and said her home country enjoys them just as much. When she moved to Upstate New York, she couldn’t satisfy her craving by finding any to buy. “I had never made them before coming here,” she says. So she took a page from her grandmother, who ran a bakery where Hurst spent a lot of her time as a child, and came up with a recipe. Featuring delicate, pale cookies (yes, the one cup of cornstarch is correct!) that almost melt in your mouth, it was my favourite of the variations I tried.

The cookies are of the simple roll-and-cut variety, and using store-bought dulce de leche makes this an extremely accessible recipe. If you can’t find dulce de leche at the store, all you need is a can of sweetened condensed milk and a stock pot or pressure cooker (ie Instant Pot). You’ll get no complaints serving the cookies as is, but if you want to add more pizazz, there are plenty of ways to do that. Hurst said it’s not uncommon to find alfajores drizzled with chocolate, dipped in chocolate (white or milk/dark), dusted with confectioners’ sugar, or rolled in coconut or almonds. “People get creative with it,” she said. Just as the best sandwiches – cookie or otherwise – let you do.

Dulce de leche-filled alfajores. PHOTO: THE WASHINGTON POST
Dulce de leche

Dulce de leche-filled alfajores

15 servings

Notes – Cut the cookies as big or small as you want, though the yield and amount of dulce de leche will vary.

Make Ahead: The cookie dough disk needs to be refrigerated for at least three hours and up to one day. Freeze rolled and cut dough for up to two months; to do so, freeze cut cookie rounds on a baking sheet, then transfer to a zip-top bag. The assembled sandwiches can be refrigerated in an airtight container for up to five days or frozen for up to three months.

Where to Buy: Look for canned or jarred dulce de leche such as La Lechera (by Nestle) at well-stocked supermarkets or Latin markets. See below for instructions on making your own.

Ingredients

120 grammes cornstarch

106 grammes all-purpose flour, plus more to dust counter

Half teaspoon baking powder

Quarter teaspoon fine sea salt

10 tablespoons unsalted butter, at room temperature

75 grammes granulated sugar

Three large egg yolks, at room temperature

Half teaspoon vanilla extract

Quarter teaspoon almond extract

280 grammes store-bought or homemade dulce de leche

Melted chocolate, for drizzling (optional)

Confectioners’ sugar, for dusting (optional)

Finely grated coconut, for decorating (optional)

Directions

In a medium bowl, whisk together the cornstarch, flour, baking powder and salt.

In the bowl of an electric mixer fitted with the paddle attachment, or using a hand mixer and a large bowl, beat the butter on medium-high until smooth, about one minute. Add the granulated sugar and continue to beat until very fluffy and light in colour, an additional two to three minutes. Scrape down the bowl and the paddle. Reduce the mixer speed to medium and add the egg yolks, one at a time, combining thoroughly after each addition. Add the vanilla and almond extracts, and mix on medium to combine. Scrape down the bowl and paddle again.

Reduce the mixer speed to low and add the cornstarch mixture. Mix until a soft but not-too-sticky dough just comes together. It doesn’t need it to be in one mass, but should form a few large, cohesive pieces. Transfer the dough to a piece of plastic wrap and pat into a thick disk. Wrap and refrigerate for at least three hours and up to one day.

Position a baking rack in the middle of the oven and preheat to 350 degrees. Line two large, rimmed baking sheets with parchment paper or silicone liners.

Lightly flour a clean, dry work surface. Remove the dough from the refrigerator, unwrap it and whack it a few times with a rolling pin to start flattening it. Roll out the dough to about 1/8-inch thick, periodically lifting and rotating the dough to keep it from sticking to the counter. Reflour the counter as necessary. You may also lightly dust the top of the dough if the rolling pin sticks. If the dough breaks in any place, patch it with your fingers. Using a two and a half inch cookie cutter (or other size cutter or glass of your choice), punch out as many cookies as you can. Dip the cutter in flour every so often for a clean cut. Gather the scraps, press them back into a disk and return to the refrigerator to firm up.

Bake the cookies for 12 to 15 minutes, rotating from front to back halfway through. The cookies should remain mostly pale with a faint hint of gold around the edges and on the bottom. Let the cookies rest on the sheet for a few minutes, then transfer to a wire rack to cool completely.

Roll out the chilled scraps, and repeat the cutting and baking of the cookies. Discard the remaining dough scraps (or bake them off as a cook’s treat, as the texture may not be quite as good).

When the cookies are cool, invert half of them on your work surface. Using a piping bag, small disher or spoon, place about one tablespoon of dulce de leche onto each upturned cookie. With a tableware knife or offset spatula, spread the dulce de leche almost to the edges. Top with the remaining cookies to form cookie sandwiches, using very gentle pressure – remember, the cookies are delicate – to help nudge the dulce de leche to the edges. Drizzle with melted chocolate, dust with confectioners’ sugar or roll in finely grated coconut, if desired.

Note: To make dulce de leche in the Instant Pot or other electric pressure cooker, remove the lid and label of a 14-ounce can of sweetened condensed milk and cover the top of the can tightly with aluminum foil. Place the can on a steamer rack in the cooker’s insert and add enough water to reach halfway up the can. Cook on high pressure for 40 minutes and allow a natural release. Remove the can, uncover and let cool for at least 20 minutes. Stir in one teaspoon vanilla extract and a pinch of fine sea salt, if desired.

To make dulce de leche on the stove top, remove the label from a 14-ounce can of sweetened condensed milk. Place on its side in a large pot and cover with at least two inches of water.

Bring to a simmer over high heat, then reduce to maintain a gentle simmer, cooking for two to three hours, depending on how dark you want the caramel. Check the water frequently to make sure the can is completely submerged (to prevent the can from exploding) and replenish as needed. Remove the can with tongs, place on a wire rack and let cool before opening. Add one teaspoon vanilla extract and a pinch of fine sea salt, if desired.

Nutrition

Calories: 215; Total Fat: 10g; Saturated Fat: 6g; Cholesterol: 63mg; Sodium: 67mg; Carbohydrates: 29g; Dietary Fibre: 0g; Sugars: 15g; Protein: 3g.