A good vanilla cake is all about the crumb: tender, moist, fine, and even, with a real vanilla flavor that comes through clean rather than just reading as sweet. This ratio gets there with a few deliberate moves. Sugar sits right around the flour weight, which keeps the cake moist and gives it that fine, soft texture. There is a generous amount of liquid from the milk, eggs for structure so the crumb holds together without turning rubbery, and a healthy dose of leavening so the cake rises tall and light instead of dense. It is a plain milk batter, so it leans on baking powder for lift and on a good vanilla for flavor.
The method is the creaming method: beat softened butter with the sugar until pale and fluffy, which works air into the fat and sets up the rise. Then I alternate the dry ingredients and the milk in additions, ending with the dry, and mix only until the batter just comes together. The reason for alternating is to avoid overmixing — once flour meets liquid, stirring builds gluten, and too much of it turns a cake tough and chewy instead of tender. The other thing to watch is overbaking, which dries the crumb out. Pan size matters here in a way that trips people up: the calculator scales the batter to the area of whatever pan you use, but bake time still changes with the pan. A wide, shallow sheet sets faster than a deeper round, and cupcakes faster still, so go by a clean toothpick rather than the clock.
Gluten-free cake is the least forgiving of these desserts, since cake relies on a delicate, even crumb that wheat handles naturally. Use a 1:1 cup-for-cup blend designed for cakes — cake-specific gluten-free blends exist and are worth seeking out — expect a slightly more delicate crumb, and be especially careful not to overmix, since gluten-free batters can turn gummy.
This ratio takes variations easily. The calculator scales the batter by area, so you can bake it in an 8×8 or 9×9 square, a 9×13 sheet, two 9-inch rounds for a layer cake, or scoop it into a muffin tin for cupcakes. Fold in sprinkles for funfetti. Swap in cake flour for an even finer crumb, or use buttermilk in place of the milk for a little tang and a more tender texture. A splash of almond extract alongside the vanilla, or some citrus zest creamed into the sugar, adds a quiet second note.