An almond croissant is a classic French pastry, often made by double-baking day-old croissants filled with a sweet almond paste or custard called frangipane.
They are typically soaked in a light syrup for moisture, topped with sliced almonds, and dusted with powdered sugar, resulting in a crispy, crunchy, and nutty treat. https://www.reddit.com/r/Baking/comments/zx2sgw/what_are_almond_croissants/