Preheat the oven to 350° F. Grease and line a baking sheet with oil. Set aside.
Next, sift together flour, milk powder, baking soda, baking powder, and salt in a large bowl. Set aside.
In a separate bowl, whisk sugar and oil until well blended.
Add strawberry extract and mix it well.
Stir in milk and yogurt.
Slowly add the dry ingredients to the wet ingredients and whisk until combined.
Consistency of the cake batter.
Pour the cake batter onto the prepared baking sheet tray.
Tap the cake pan on the counter — A tap or two on the counter will allow any trapped air to release from the batter, ensuring a smooth finish to the cake.
Bake the cake for 10 minutes or until the toothpick inserted in the center comes out clean. When done, remove the cake from the oven and set it on the counter. Allow the cake to cool comfortably.
Once the cake has cooled, cut the cooled cake into rounds. Set aside.
This sheet cake yields 15 cake circles.