[Alex_63]

yurikjke,
Хоть бы отформатировали код...

router.post('/admin/recipes/create_recipe', function (req, res) {
    var selectedIngredients = new Array(req.body.ingredients.length);
    for(var i = 0; i < req.body.ingredients.length; i++) {
        var id = new ObjectId(req.body.ingredients[i]);
        Ingredients.findById(id.path, function(err, ingredient) {
            console.log(ingredient);
            selectedIngredients[i].push(ingredient);
            console.log(selectedIngredients[i]); 
        });
    };
    console.log(selectedIngredients);
});