Imagine sinking your fork into a slice of thick, golden-toasted sourdough, where crunchy caramelised edges give way to a warm, silky vanilla custard center. As you take a bite, juicy raspberries burst with tart brightness, perfectly balancing the velvety richness of a dessert that feels like it belongs in a high-end French patisserie.
Yet, behind this decadent presentation lies a secret: it takes less than 15 minutes to prepare and delivers a macro-friendly powerhouse of clean protein to fuel your morning. This is breakfast transformed—elevating a viral trend into a balanced, body-nourishing ritual that looks and tastes like a luxury treat.
Why is High-Protein Custard Toast So Good?
- Decadent Yet Healthy: Satisfies sweet cravings with zero refined sugar overload.
- Protein-Packed Powerhouse: Delivers over 25 grams of high-quality protein per serving to keep you full for hours.
- Quick & Effortless: Bakes in just 10 to 12 minutes in the oven or air fryer.
- Texture Perfection: Combines crisp, toasted crust with a smooth, warm custard and bursting fruit.
Ingredients
- Thick-cut sourdough bread (100g) — Provides a sturdy, tangy base with complex carbs that holds the liquid custard without getting soggy.
- Plain non-fat Greek yogurt (120g) — Adds thick, creamy body to the custard while boosting protein and gut-healthy probiotics.
- Whole egg (50g) — Binds the custard together and gives it a rich, traditional golden texture upon baking.
- Vanilla protein powder (20g) — Elevates the protein count while adding natural sweetness and aromatic vanilla flavour.
- Pure maple syrup (15ml) — Infuses a gentle, unrefined caramel sweetness into the filling.
- Vanilla extract (5ml) — Enhances the dessert-like aroma and deepens the vanilla notes.
- Fresh mixed berries (50g) — Offers bright acidity, natural sweetness, and antioxidants that burst when heated.
- Ground cinnamon (1g) — Adds warm, fragrant spice that complements toasted bread and fruit.
How to Make High-Protein Custard Toast
- Preheat your oven to 200°C (or air fryer to 180°C) and line a small baking tray with baking parchment.
- Indent the center of each slice of sourdough using the back of a spoon, pressing down firmly to create a wide well while leaving a 1-cm crust border.
- Whisk together the Greek yogurt, egg, vanilla protein powder, maple syrup, and vanilla extract in a small bowl until completely smooth and lump-free.
- Pour the creamy custard mixture evenly into the indented wells of the bread slices.
- Arrange the fresh berries over the custard, pressing them in slightly, and sprinkle with a pinch of ground cinnamon.
- Bake for 10 to 12 minutes in the oven (or 8 to 10 minutes in the air fryer) until the custard is set, puffed up, and lightly golden around the edges.
- Dust with a touch of powdered sweetener or a drizzle of warm honey, and serve immediately while hot.
Tips for the Best High-Protein Custard Toast
- Choose Sturdy Bread: Sourdough or thick brioche works best; thin sandwich bread will collapse under the moist filling.
- Don't Over-mix Protein: Whisk protein powder gently into yogurt to avoid trapping excess air, which can make the custard collapse after baking.
- Watch the Bake: Air fryers cook faster on top; if using an air fryer, check at the 7-minute mark so the crust doesn't burn before the custard sets.
Storage and Freezing Instructions
- Refrigeration: Store leftover cooked toast in an airtight container in the fridge for up to 2 days. Reheat in an air fryer or toaster oven at 170°C for 3–4 minutes to regain crispness.
- Freezing: Freezing is not recommended after baking as the custard texture degrades and becomes watery upon thawing.
High-Protein Custard Toast Your Way
- Dairy-Free/Vegan: Use thick coconut or soy yogurt, replace the egg with a flax egg or extra yogurt + cornstarch, and use plant-based protein powder.
- Chocolate Hazelnut: Swap vanilla protein powder for chocolate flavour and top with sliced strawberries and dark chocolate chips.
- Apple Pie Style: Replace berries with thinly sliced apples, a drizzle of maple syrup, and extra cinnamon and nutmeg.
Make Ahead
You can whisk the custard mixture up to 24 hours in advance and keep it sealed in a jar in the refrigerator. In the morning, simply indent your bread, pour in the chilled custard, top with fruit, and bake fresh!
Nutrition Information
(Estimated values per serving based on 2 slices/full recipe)
- Calories: 395 kcal
- Protein: 31 g
- Carbohydrates: 48 g
- Fat: 9 g
- Fiber: 5 g
Frequently Asked Questions
Can I use whey protein powder?
Yes! Whey and casein blends work exceptionally well for a smooth, velvety texture. Pure plant proteins may require an extra 5–10 ml of liquid if the batter becomes too thick.
Why did my custard collapse after baking?
A slight sink is normal as the custard cools, but excessive shrinking happens when the mixture is whipped too vigorously or overbaked. Bake just until the center wobbles slightly like a cheesecake.
Can I make this in a toaster oven?
Absolutely! A toaster oven set to 200°C works just like a standard oven and bakes the toast to golden perfection in about 10–12 minutes.
