1. Will oil-based brownies taste different from butter-based ones?Yes, slightly. Oil makes brownies more moist but less rich in buttery flavor. Adding a touch of vanilla or espresso powder can enhance taste.2. Can I use margarine instead of butter?Yes. Choose a stick margarine with at least 80% fat for best results. Lower-fat spreads may alter texture and make brownies less chewy.3. What about applesauce as a butter substitute?Unsweetened applesauce can replace half or all the butter for a lower-fat option. Expect a softer, cake-like texture and slightly fruity flavor.4. Do I need to change baking time with no butter?Sometimes. Oil and other substitutes may make brownies bake faster, so start checking for doneness 3–5 minutes earlier than the original recipe.5. How do I make dairy-free brownies without butter?Use vegetable or coconut oil, dairy-free margarine, or nut butters. Pair with dairy-free chocolate for a fully plant-based version.6. Will my brownies be chewy without butter?Yes, if you use oil and the right sugar-to-flour ratio. Avoid overmixing, and bake just until the center is set to keep them chewy.7. Can nut butters replace butter in brownies?Yes. Peanut, almond, or cashew butter can replace part or all of the butter for a rich, dense texture and added nutty flavor.8. Do butter-free brownies stay fresh as long?They often stay moist longer due to the oil content. Store in an airtight container at room temperature for up to 4 days, or freeze for longer storage.