1-First Step: Prepare Wet Ingredients
Cream 1/4 cup softened unsalted butter with 1/2 cup granulated sugar. Beat until light and fluffy, about 2-3 minutes by hand or 1 minute with mixer. This builds air for tenderness. Add 1 large egg and 1 tsp pure vanilla extract. Mix until smooth. Scrape bowl sides to incorporate fully. Tip: Room-temp ingredients blend better, preventing lumps.

2-Second Step: Combine Dry Ingredients
In separate bowl, whisk 3/4 cup all-purpose flour, 1/2 tsp baking powder, and 1/4 tsp salt. Sift if clumpy for even rise. Dry mix ensures no pockets of baking powder, avoiding bitter spots. Measure flour by spooning lightly, not packing, to keep cake light.

3-Third Step: Mix Batter
Add dry to wet alternately with 1/3 cup whole milk. Start with half flour, mix gently, then half milk. Repeat. Stir just until combined, 10-15 strokes. Overmixing toughens gluten. Batter should be thick but pourable, pale yellow. Rest 5 minutes for flavors to meld.

4-Fourth Step: Bake the Cake
Pour into prepared 6-inch pan. Smooth top with spatula. Tap pan lightly to release bubbles. Bake at 350°F for 20-25 minutes. Toothpick test at 20 minutes: clean with crumbs ideal. Rotate pan halfway if oven uneven. Metal pans bake faster than glass; adjust 2 minutes down for dark pans. Golden edges signal doneness.

5-Fifth Step: Cool Properly
Cool in pan 10 minutes on rack. Run knife around edges, invert onto plate. Cool fully, 30-45 minutes, before frosting. Prevents sinking or soggy layers. Cover loosely to retain moisture.

6-Final Step: Finishing Touches and Serving
Frost with buttercream: beat 1/4 cup butter, 1 cup powdered sugar, 1/2 tsp vanilla, 1-2 tbsp milk. Spread on cooled cake. Slice into 4 wedges. Serve warm with berries or dust sugar. Pairs with iced tea from our apple oat muffins collection for breakfast twist. Total time: 45 minutes. Yields moist cake every time.