What about something like this (in JS)?

  // Option 1
  const Pizzas = {
    Hawaiian: {
        type: 'hawaiian',
        crust: 'thin',
        sauce: 'tomato',
        cheese: 'regular',
        toppings: ['ham', 'pineapple'],
    },
    Pepperoni: {
        type: 'pepperoni',
        crust: 'thin',
        sauce: 'tomato',
        cheese: 'regular',
        toppings: ['pepperoni'],
    },
  };

  // Option 2
  // Pizzas could be returned from an API, so that the pizza 
  types are configurable outside of the code
  const response = [
    {
        type: 'hawaiian',
        crust: 'thin',
        sauce: 'tomato',
        cheese: 'regular',
        toppings: ['ham', 'pineapple'],
    },
    {
        type: 'pepperoni',
        crust: 'thin',
        sauce: 'tomato',
        cheese: 'regular',
        toppings: ['pepperoni'],
    },
  ];

  const makePizza = (pizza) => requests.post(PIZZA_URL, pizza);

  // Then, for Option 1
  makePizza(Pizzas.Hawaiian);
  makePizza(Pizzas.Pepperoni);

  // Or, for Option 2 (e.g. user selected via a menu)
  makePizza(selectedPizza);