public function megaCookieWithCalories($teaspoons, $calories)
 {
     $megaCookie = null;
     $ingredientNames = $this->larder->ingredients();
     foreach ($this->combinations->generate($teaspoons) as $combination) {
         $quantities = [];
         foreach ($combination as $k => $amount) {
             $ingredient = $ingredientNames[$k];
             $quantities[$ingredient] = $amount;
         }
         $recipe = new Recipe($this->larder, $teaspoons, $quantities);
         if ($recipe->totalScoreForProperty("calories") != $calories) {
             continue;
         }
         if (!$megaCookie || $recipe->totalScoreForRecipe() > $megaCookie->totalScoreForRecipe()) {
             $megaCookie = $recipe;
         }
     }
     return $megaCookie;
 }