Can I make the croquette filling ahead of time?
Yes. Prepare the beef ragout filling up to 2 days ahead, refrigerate in an airtight container, then shape and bread the croquettes when ready to fry.
Why do my croquettes break open when frying?
The filling may be too warm or loose. Chill the shaped, breaded croquettes for at least 1 hour before frying, and ensure the filling is thick enough to hold its shape.
What cut of beef works best for the stock and ragout?
Chuck or beef stew meat provides good flavor and collagen. Use marrow bones in the stock for richness, then shred or finely chop the cooked meat for the filling.
Can I bake instead of deep-fry?
Deep frying is traditional and creates the signature crispy exterior. Baking will not replicate this texture, though an air fryer at 375°F for 12–15 minutes is a lighter alternative.
What mustard should I use?
Dutch yellow mustard or whole-grain mustard is traditional. Use whichever you prefer, served on the side or spread lightly on the bun.