Prepare the corn for grilling. Brush the kernels with butter or olive oil and season with salt and pepper, or these gourmet options. Roll each corn cob in a square of aluminum foil, twisting the ends to secure, like a candy wrapper. If you prefer, you can wait on the butter and herbs until the corn is cooked.
Baking powder is a mixture of baking soda, calcium acid phosphate, and starch. It is used as a leavening. Baking flour is ground wheat and covers all flours used for baking, including cake flour, pastry flour, all-purpose flour, and self-rising flour. So yes, there is a very big difference.
Flour provides the structure for the product. The gluten, or protein, in flour, combines to form a web that traps air bubbles and sets. Starch in flour sets as it heats to add to and support the structure. In cakes, cookies, and quick breads, we want little gluten formation, which makes products tough. Fats and sugars help prevent gluten formation. In most baked goods, all-purpose flour is a good choice; it has less gluten than bread flour.