Ostrovit Erythritol is a crystalline, single-ingredient sweetener containing 100% erythritol, so it can be used in many places where you would normally add granulated sugar: coffee, tea, porridge, yoghurt, fruit desserts, homemade sweets or baking mixtures. Because its sweetness is typically a little lower than regular sugar, it is best to start with the amount you would normally use and then adjust according to taste rather than expecting an exact one-to-one flavour match in every recipe.
In drinks, it dissolves more easily when stirred into hot coffee or tea; in cold drinks, stirring longer or dissolving it first in a small amount of warm liquid can help. In desserts and baking, it gives sweetness without adding regular sugar, but it may not behave exactly like sugar in recipes where sugar affects texture, browning, caramelisation or moisture. For simple mixtures such as yoghurt bowls, porridge, creams, shakes or lighter bakes, this is usually not an issue; for delicate cakes, syrups or caramel-style recipes, a small test batch is sensible.
Some people notice a mild cooling sensation with erythritol, especially in cold foods or when used in larger amounts. This is normal for this type of sweetener and can suit fruit desserts, chilled drinks and fresh-tasting recipes, but it may be less desirable in recipes where you want a warm, caramel-like sugar profile.