Melt the butter & measure the amount it needs. If it needs 2/3 cup oil, use that much melted butter.
It would be difficult to make brownies without eggs. If you didn't have chocolate, you could make a blonde brownie or more of a coffee cake with cinnamon. If you don't have butter, you can substitute shortening, oil, or applesauce if you want to go healthier. However, you need eggs to make your brownies raise. You can use egg substitute, such as Egg Beaters, but that is really your only other option.
In baking, you can substitute apple sauce for most of the oil. For sauteing, you can use butter, but it may burn. For frying you have to use oil
In substituting olive oil for vegetable oil you would use the same amounts, but bear in mind olive oil can have a stronger taste than vegetable oil. It may be wise to replace some of the oil with butter or applesauce to avoid a strong olive taste.
Yes. it matters. The brownies would taste awful and not cook correctly.
It depends on what you are baking or cooking. Vegetable oil can substitute in some cases. Although it will change the characteristic of your end product because vegetable oil has less "shortening power" than vegetable shortening. Butter can substitute too but you would have to increase the volume and there is the risk of burning depending on what you are making. Lard can substitute too. Its really hard to give an answer that is good, safe without knowing what you are using the shortening for. If you are frying something it is another different matter too.
Almost all pancake recipes use oil rather than butter In the batter. Margarines and butter-substitute spreads are mainly vegetable oil. However, most oils do not have the consistency or flavor to be acceptable toppings for pancakes, even though once a spread has melted, the appearance would be the same.
Vegetable oil is unsaturated. Butter is saturated. Im not sure about shortening.
= Butter, Substitutes = Unsalted butter can be substituted for regular butter in any recipe. It is NOT necessary to add salt. Margarine can also be substituted for butter. Do NOT use lowfat spreads or light butter for baking.
vegetable oil would be unsaturated and butter saturatedd, idk about shortening
You should use the same amount of butter. It's probably also best to melt the butter so that it combines well.
Neither. Milk is an input for butter. One does not use milk on toast instead of butter which would make it a substitute. Nor does one always eat milk with butter which would make it a complement.
NO. Oil and shortening do not work the same way in recipes for breads, whether it is rolls or biscuits.