Preheat the oven: Set it to 350°F (175°C) to ensure consistent baking.

Prepare your pan: Grease a 9×13-inch baking pan with butter or cooking spray, or line it with parchment paper for easy removal.

In a medium-sized bowl, whisk together:

2 cups all-purpose flour

2 teaspoons baking powder

½ teaspoon baking soda

¼ teaspoon salt

This step ensures the leavening agents are evenly distributed for a perfect rise.

In a large mixing bowl:

Beat 2 large eggs and 1 cup of sugar until light and slightly fluffy.

Stir in ½ cup melted butter and 1 teaspoon vanilla extract, mixing until smooth.

Gradually add 1 cup of plain kefir, blending gently to create a creamy batter base.

Gradually add the dry ingredients to the wet mixture, incorporating them slowly to ensure an even blend. Use a spatula or a whisk, and mix just until combined—overmixing can make the cake dense.

Optional: Fold in extras like chocolate chips, blueberries, or chopped nuts for a fun twist.

Evenly distribute the batter into the prepared baking pan.

Allow the dish to bake in the oven for approximately 30 to 35 minutes. To confirm it’s fully cooked, insert a toothpick into the center—if it comes out clean, it’s ready to serve

Once the cake is baked, allow it to sit in the pan for about 10 minutes to settle. Afterward, gently transfer it to a wire rack where it can cool completely before serving or decorating.