1-First Step: Prep Your Mise en Place Soften 1 cup butter at room temperature for 30 minutes. Zest 2 lemons and measure 1/4 cup fresh juice. In a small bowl, whisk dry items: 2.5 cups flour, 1 tsp baking soda, 1/2 tsp salt. This setup speeds up mixing and ensures even distribution. For gluten-free, use the blend here.

2-Second Step: Cream Butter and Sugars Beat 1 cup granulated sugar, 1/2 cup brown sugar, and softened butter on medium speed for 2-3 minutes until light and fluffy. Scrape sides often. This step builds air for tenderness in your cookie cake recipe.

3-Third Step: Add Wet Ingredients Beat in 2 eggs one at a time, then mix in lemon juice and zest. For vegan, prepare flax eggs ahead and let sit 5 minutes to gel. The batter may look curdled normal from acidity. Pause mixer to avoid overbeating.

4-Fourth Step: Combine Dry and Wet Gently fold in dry mix until just combined; do not overmix for chewy results. Stir in optional white chocolate chips. For low-calorie, add 1/2 cup blueberries instead for natural sweetness and pop.

5-Fifth Step: Spread and Bake Press dough evenly into greased 10-inch pan using wet spatula. Bake at 350°F (175°C) for 25-30 minutes. Edges golden, center set with slight jiggle. Gluten-free may need 28-32 minutes. Cool in pan 10 minutes, then on rack fully.

6-Sixth Step: Make and Apply Glaze Whisk 1 cup powdered sugar with 2 tbsp lemon juice until smooth. Drizzle over cooled cake. For cream cheese frosting variation: beat 8 oz cream cheese, 1/4 cup butter, 2 cups powdered sugar, lemon zest. Spread thickly. Chill 30 minutes for clean slices.