#### **Step 1: Cook the Apples**
In a skillet over medium heat, melt butter. Add diced apples, brown sugar, and cinnamon.
Cook for 5-7 minutes, stirring occasionally, until apples soften.
Remove from heat, stir in vanilla extract, and set aside.
#### **Step 2: Make the Cake Batter**
Preheat oven to **350°F (175°C)** and grease a 9x9-inch baking pan.
In a mixing bowl, beat butter and sugar until light and fluffy.
Add eggs one at a time, mixing well, then stir in vanilla extract.
In a separate bowl, whisk flour, baking powder, and salt.
Gradually add dry ingredients to the wet mixture, alternating with milk, until smooth.
#### **Step 3: Assemble the Cake**
Spread half the batter into the prepared pan.
Spoon half of the apple mixture over the batter.
Add the remaining batter on top, then spread the rest of the apples evenly.
Bake for **35-40 minutes**, or until a toothpick inserted in the center comes out clean.
#### **Step 4: Make the Glaze & Serve**
In a bowl, whisk powdered sugar, milk, and vanilla until smooth.
Drizzle over the warm cake and let it soak in before slicing.
Serve warm and enjoy!