A basic milkshake consists of ice cream and milk, but mix-ins and toppings provide endless variations. The easiest way to make a milkshake is with a blender, but it's also possible to do it by hand.

Homemade mayonnaise is a different beast from the store-bought stuff. Even my favorite brands—Kewpie and Duke’s—can’t hold a candle to the rich and tangy DIY mayo. The texture is less jiggly, the ...