diff --git a/src/gfn/marc/Cocktail.java b/src/gfn/marc/Cocktail.java
index ec65ee9..336a804 100644
--- a/src/gfn/marc/Cocktail.java
+++ b/src/gfn/marc/Cocktail.java
@@ -3,8 +3,13 @@ package gfn.marc;
 import java.util.List;
 
 public class Cocktail {
+    private List<Zutat> zutaten;
+
+    public Cocktail(List<Zutat> zutaten) {
+        this.zutaten = zutaten;
+    }
 
     public int getAnzahlZutaten() {
-        return 0;
+        return this.zutaten.size();
     }
 }
diff --git a/src/gfn/marc/StandardCocktailMixer.java b/src/gfn/marc/StandardCocktailMixer.java
index 2e47aa0..1ec8a33 100644
--- a/src/gfn/marc/StandardCocktailMixer.java
+++ b/src/gfn/marc/StandardCocktailMixer.java
@@ -1,27 +1,33 @@
 package gfn.marc;
 
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.List;
 
 public class StandardCocktailMixer implements CocktailMixer{
 
+    List<Zutat> zutaten = new ArrayList<>();
+
     @Override
     public void hinzufuegen(Zutat zutat) {
+        this.zutaten.add(zutat);
     }
 
     @Override
     public Cocktail mixen() throws EkligeZutatenKombinationException {
-        return null;
+        if (enthaelt(this.zutaten, Banane.class) && enthaelt(this.zutaten, Apfelsaft.class)) {
+            throw new EkligeZutatenKombinationException();
+        }
+        List<Zutat> zutaten = new ArrayList<>(this.zutaten);
+        this.zutaten.clear();
+        return new Cocktail(zutaten);
     }
 
     @Override
     public int getAnzahlZutaten() {
-        return 0;
+        return this.zutaten.size();
     }
 
-
-
-
-    // gegeben
     public static <T> boolean enthaelt(Collection<?> collection, Class<T> klasse) {
         for (Object o : collection) {
             if (o != null && o.getClass() == klasse) {