Irish Soda Bread French Toast (Cast Iron Recipe)
Turn thick Irish soda bread into golden French toast by soaking ¾- to 1-inch slices in a simple egg-and-milk custard, then cooking them in gradually heated cast iron. Keep the pan at 300–350°F, use butter with a little neutral oil, and check that the center reaches 160°F for a tender, safely cooked result.
The must-have detail is heat control. Soda bread is often dense, and cast iron holds heat well. If the pan is too cool, wet custard can leak and stick; if it is too hot, the outside may brown before the center cooks through. A steady, moderate temperature gives you time to cook each slice evenly.
This method makes four slices and works on a standard stovetop. You do not need special equipment, though an infrared thermometer helps check the pan’s surface temperature. A food thermometer is useful for checking the thickest slice.
Cast-Iron Setup and Soda-Bread Prep
Bare cast iron can work on gas, electric, and induction stoves, but it heats gradually and holds heat strongly. Start with a dry pan and moderate burner setting. Cut the bread evenly so the slices soak and cook at a similar pace.
Use unenameled cast iron with an oven-safe handle if you plan to keep finished slices warm in the oven. There is no single cookware-wide maximum temperature for bare cast iron; seasoning, handle materials, and manufacturer guidance affect practical use. This recipe uses only moderate heat.
Ingredients and equipment
For four slices, gather:
- 4 slices Irish soda bread, ¾ to 1 inch thick
- 2 large eggs
- ½ cup (120 mL) milk
- 1 tablespoon sugar
- ½ teaspoon ground cinnamon
- A pinch of salt
- 1 tablespoon unsalted butter, plus more between batches if needed
- 1 teaspoon neutral refined oil per batch
You will also need a mixing bowl, whisk, wide shallow dish, spatula, and wire rack. If you want to hold cooked slices, preheat the oven to 200°F (93°C) and set the rack on a baking sheet. The rack lets warm air move around the toast, helping the underside stay less damp.
Prepare the pan and bread
Cut the bread into even slices. If the loaf is very crumbly, use a sharp serrated knife and a gentle sawing motion. Set the slices aside while you whisk the eggs, milk, sugar, cinnamon, and salt in a shallow dish until no streaks of egg white remain.
Put the dry skillet over low to medium-low heat for 5–7 minutes. Gradual preheating helps reduce hot spots and gives the pan time to warm evenly. Do not rush this step by turning the burner to high.
| What you notice | Likely cause | What to do |
|---|---|---|
| Custard leaks as soon as bread hits the pan | Pan is underheated, or the slice is saturated | Let the pan preheat longer; shorten the next dip |
| Butter browns or smokes quickly | Pan is too hot | Lower the burner and let the skillet settle |
| One area browns faster | Uneven burner or pan heat | Rotate the skillet if safe, and adjust the burner |
| Toast browns slowly but stays pale | Burner may be too low | Raise it slightly and allow time for the surface to respond |
The practical target is a skillet surface of 300–350°F (149–177°C). An infrared thermometer can check it, but careful observation works too: the fat should foam, not smoke. Key takeaway: even slices and a slowly warmed pan set up the rest of the method.
Custard Technique and Controlled-Heat Cooking
Custard is the egg-and-milk mixture that coats and sets around the bread as it cooks. A brief soak adds flavor without making soda bread soggy. Cook in a single layer over moderate heat, and use an internal temperature check to confirm the egg mixture has cooked through.
Soak without saturating
Pour the whisked custard into a shallow dish wide enough to hold one slice. Dip each slice for 15–20 seconds per side, then lift it and let excess custard drip back into the dish. Dense or stale bread may need up to 30 seconds per side.
Avoid leaving the slices to soak while you prepare the skillet. Irish soda bread can absorb liquid unevenly, especially if the crumb is tight. If a slice feels soft or begins to sag when lifted, move it to the pan rather than giving it more time.
Cook in batches
When the pan has warmed, add 1 tablespoon butter and 1 teaspoon neutral refined oil. The butter adds flavor, while the oil helps the fat tolerate heat; refined avocado oil commonly has a smoke point near 500°F (260°C), though the exact value varies by product. Proceed when the butter foams without smoking.
Lay the dipped slices in the skillet in a single layer, leaving space between them. Cook for about 3–4 minutes per side. Use the first side to judge the burner: if it turns dark before three minutes, lower the heat. If it remains pale and wet, raise the heat a little.
Turn each slice with a thin spatula once the bottom is deeply golden and releases with gentle pressure. Do not force it or scrape hard. If it resists, give it more time; a set crust often releases more easily.
Check the center of the thickest slice with a food thermometer. It should reach 160°F (71°C), the USDA safe minimum for egg dishes. If the outside is already quite dark but the center is below 160°F, lower the burner and continue cooking more gently. Cast iron keeps releasing heat after you reduce the flame, so allow it a moment to settle.
Adjust heat between batches
Cast iron’s heat retention is useful, but it means the skillet may grow hotter as you cook. Check the color and pace of browning with each batch rather than assuming the first setting will work throughout. Add fresh butter and oil as needed, but do not let the fat smoke.
| Bread condition | Soak time per side | Heat adjustment |
|---|---|---|
| Fresh, tender slices | 15–20 seconds | Use the standard 300–350°F target |
| Dense, tight crumb | 20–30 seconds | Keep slices moving; do not leave them in custard |
| Stale, firm slices | Up to 30 seconds | Watch closely for a softened or sagging slice |
| Very thick slices | 20–30 seconds | Cook gently and check the center temperature |
For a crisp surface and soft center, hold finished slices on the wire rack in the 200°F oven while you cook the remaining batch. Do not stack them; trapped steam can soften the browned crust. Key takeaway: let browning guide burner adjustments, but use 160°F at the center as the doneness check.
Cleaning, Drying, and Seasoning Care
Seasoning is the thin layer of baked-on oil that helps protect bare cast iron and gives its surface a dark finish. Clean the skillet after it cools to warm, not while it is dangerously hot. Dry it fully, then wipe on a very thin film of cooking oil.
Clean the skillet after cooking
Let the pan cool until it is warm enough to handle safely. Wipe away loose crumbs and excess fat with a paper towel or cloth. If bits of egg or bread remain, use warm water and a soft brush or sponge, then dry the pan right away.
Do not pour cold water onto hot cast iron or plunge the skillet into water. A rapid temperature change can crack or warp cookware. Avoid aggressive scraping with metal tools, which can damage the seasoning. Gentle cleaning is usually enough for this recipe.
Dry and oil lightly
After washing, dry the skillet completely with a towel. If needed, place it over low heat briefly to remove remaining moisture, then let it cool enough to handle. Wipe on a very thin film of cooking oil and remove any visible excess; a thick, sticky layer is not the goal.
Store the skillet dry. If you spot rust later, clean and dry the affected area, then restore the surface according to the pan maker’s care directions. Key takeaway: avoid sudden temperature changes, dry the pan fully, and finish with only a trace of oil.
Serving and Dining Presentation
Irish soda bread French toast is best served warm, soon after cooking, while the browned edges are still distinct. Keep the serving simple so the bread’s flavor remains clear. Choose toppings that suit the loaf, especially if it contains raisins or other additions.
Serve the slices plain, with a little butter, or with maple syrup. Fresh fruit can add a cool contrast. For a less sweet plate, omit the sugar from the custard and serve with plain yogurt or fruit instead.
If you are cooking for several people, place each finished slice on the wire rack in the warm oven while the next batch cooks. This short hold helps keep the portions warm without stacking them. Serve once the final slice is cooked and checked.
For a more savory direction, skip the cinnamon and sugar, keep the salt, and serve the toast with a savory side. The core method remains the same: soak briefly, cook at moderate heat, and check the center. Next step: choose sweet or savory toppings before you start, so the toast can go straight from skillet to table.
Frequently Asked Questions
These quick answers cover the main choices and problems when making French toast with Irish soda bread in cast iron. Use them to adjust soaking, heat, and timing without changing the basic method. When in doubt, prioritize steady browning and a 160°F center.
Can I use stale Irish soda bread?
Yes. Stale slices work well, but dense bread may need up to 30 seconds per side in the custard. Lift carefully and cook as directed.
How thick should I cut the bread?
Cut slices ¾ to 1 inch thick. Even slices are easier to soak and cook evenly than pieces of mixed thickness.
How long should I soak each slice?
Soak for 15–20 seconds per side. Dense or stale slices can take up to 30 seconds per side, but should not become saturated.
What temperature should cast iron be for French toast?
Aim for a pan surface of 300–350°F (149–177°C). Preheat gradually for 5–7 minutes over low to medium-low heat.
Can I cook this on an induction stove?
Yes. Bare cast iron works on induction. Warm the skillet gradually and adjust the setting as the pan heats and retains warmth.
How do I know the center is cooked?
Check the thickest slice with a food thermometer. The center should reach 160°F (71°C), the USDA safe minimum for egg dishes.
Why is the bread sticking to my skillet?
The pan may be too cool, or the slice may be too wet. Preheat fully, let excess custard drip off, and wait for the toast to release before turning.
Can I keep cooked slices warm while I finish the batch?
Yes. Set them in a single layer on a wire rack in a 200°F (93°C) oven. Avoid stacking, which can soften the crust.
How should I clean cast iron afterward?
Let it cool until warm, wipe or wash gently, dry it completely, and apply a very thin film of oil. Do not plunge a hot pan into water.
(This article was written by one of our staff writers, Steven R. Bancroft. Visit our Meet the Team page.)
