Can I make these muffins ahead and freeze them?
Yes, these muffins are designed to be frozen. Bake, cool completely, then freeze in an airtight container for up to 3 months. Reheat in the microwave or oven.
What type of bread works best for this recipe?
Brioche bread is ideal because it absorbs the custard mixture while staying tender. Day-old brioche works especially well as it's slightly drier and soaks up more flavor.
Can I substitute the walnuts and chocolate chips?
Yes. Use pecans or almonds instead of walnuts, or try dried cranberries, blueberries, or white chocolate chips as alternatives.
How do I know when the muffins are fully cooked?
The custard should be set but still slightly jiggly in the center, similar to French toast. A toothpick inserted should come out mostly clean. Bake until golden on top and edges are firm.
Can I use egg substitute for this recipe?
Not recommended, as eggs are essential for the custard structure. However, you could try aquafaba (3 tbsp per egg) in a pinch, though the texture will differ.