All-Purpose Flour (Best Option)
1 cup per 1 cup bread flourAll-purpose flour contains a moderate protein level (around 10-12%) that is close enough to bread flour (12-14%) to support gluten formation, which helps the bread pudding maintain a pleasant chewiness and custard binding. The gluten network traps moisture and air, contributing to a tender yet structured final product.
When substituting, mix the flour thoroughly with the custard base to avoid lumps and ensure even hydration. Avoid overmixing to prevent toughness. The slight reduction in protein means the pudding may be a bit less chewy but still holds its shape well.
Compared to bread flour, the pudding will be marginally softer and less elastic but still enjoyable, making it the most practical and accessible substitute.