diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 00000000..13566b81
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/recipe.md b/recipe.md
index a8b51a4d..481a785c 100644
--- a/recipe.md
+++ b/recipe.md
@@ -4,9 +4,16 @@
 - 2 cups all-purpose flour
 - 1 3/4 cups granulated sugar
 - 3/4 cup unsweetened cocoa powder
+- 1 cup chocolate chips
+- 1 tsp vanilla extract
 - ...
 
 ## Instructions:
 1. Preheat the oven to 350°F (175°C).
-2. In a large bowl, whisk together the flour, sugar, and cocoa powder.
-3. ...
\ No newline at end of file
+2. In a large bowl, whisk together the flour, sugar, cocoa powder, chocolate chips, and vanilla extract.
+3. ...
+
+## Additional Directions by Murat:
+4. Add a tablespoon of instant coffee to the dry ingredients for a hint of mocha flavor.
+5. Mix in a handful of chocolate chunks for extra indulgence.
+6. Line the bottom of the baking pan with parchment paper for easy cake removal.
diff --git a/src/DataTypes.java b/src/DataTypes.java
index 4f807c1f..eebcb595 100644
--- a/src/DataTypes.java
+++ b/src/DataTypes.java
@@ -4,7 +4,7 @@ public class DataTypes {
     // TODO TASK 1: fix this code so that it passes the test in DataTypesTest.java
     public static long sum(List<Integer> numbers) {
 
-        int s = 0;
+        long s = 0;
         // below is a "foreach" loop which iterates through numbers
         for (int x : numbers) {
             s += x;