Absolutely! This apple buns recipe is versatile, and several ingredient substitutions can be made to suit dietary preferences or to accommodate what you have at home. For instance, whole wheat flour can be used in place of all-purpose flour for a healthier twist, but be aware that it may result in a denser texture. If you're looking for a dairy-free option, oat or almond milk can replace whole milk, and vegan butter can take the place of softened butter. As for the filling, feel free to mix and match different fruits with the apples, such as pears or berries, depending on the season or your taste preferences. Additionally, reducing or skipping the added sugar can make these buns more suitable for low-sugar diets without compromising the flavor too much.