The key ingredients in Speculoos Buns include all-purpose flour, sugar, salt, dry yeast, warm milk, melted butter, an egg, and of course, Speculoos cream as the luscious filling. All-purpose flour acts as the base for the dough, providing structure and a soft texture when baked. Sugar not only adds sweetness but also plays a crucial role in browning the buns, enhancing their flavor. A pinch of salt is essential for balancing sweetness and elevating the overall taste. The dry yeast is responsible for the leavening process, allowing the dough to rise and develop a light, airy consistency. Warm milk hydrates the flour and activates the yeast, while melted butter enriches the dough, contributing to its tenderness and rich flavor. Lastly, the egg binds the ingredients together, creating a cohesive dough that puffs up beautifully during baking. The Speculoos cream introduces a distinctive spiced flavor profile, reminiscent of traditional Dutch cookies, which adds an irresistible richness to every bite.