Preheat the oven to 375F and line a baking sheet with parchment paper.
Use a large serrated bread knife to gently slice the croissants in half, lengthwise. Use a gentle sawing motion to avoid crushing the croissants.
Place them on your lined baking sheet. I place the bottoms of the croissants cut side up, and the tops of the croissants cut side down. Toast for 4 minutes. Set the tray aside.
Put the 1 cup fine almond flour, softened 6 Tbsp unsalted butter, 3/4 cup sugar, 1 large egg, 1/4 tsp salt, 1 tsp vanilla extract, and 1 1/2 tsp almond extract into a food processor or stand mixer. You can also do this by hand in a bowl, but make sure your butter is very soft. Process or mix everything together until very well combined. It should be smooth and spreadable.
Spread a layer of frangipane on the bottom halves of each croissant. I used about 2 tablespoons for my large croissants. Brush the tops of the croissants lightly with butter and sprinkle with the sliced almonds. Bake for an additional 7 minutes, or until golden and crisp. The frangipane will be lightly puffed and starting to bubble.
Place the tops of the croissants loosely over the bottoms, and serve right away. You can also let them cool and serve at room temperature.
Keep them loosely covered with foil on the counter for the first day. After that, refrigerate. Re-crisp refrigerated ones for a few minutes in a 325–350°F oven.I’d avoid the microwave ~ it softens the croissant.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
Did You Make This?We love seeing what you've made! Tag us on social media at @theviewfromgreatisland for a chance to be featured.