Ultimate Moist Whole-Lemon Cake with Tart Glaze Step-by-step instructions

Before you start

Before starting, preheat the oven to 340°F (170°C) and position a rack in the center. Grease a 9-inch loaf pan and line it with parchment paper, leaving overhang on the long sides. Wash the lemon thoroughly and cut it into wedges, removing every seed.

Measure all ingredients accurately: flour should be spooned into the measuring cup and leveled, not packed. Have your blender, mixing bowl, and whisk ready. The entire process is quick, so having everything prepped will make it seamless.

Instructions

Blend and Mix

1. 1Blend the wet ingredients
   Wash the lemon thoroughly. Cut it into wedges and remove all seeds. Place the wedges in a high-speed blender. Add the eggs, granulated sugar, vegetable oil, and milk. Blend on high for 2 minutes until the mixture is a velvety, fragrant yellow puree.
   Look for The puree should be completely smooth, with no visible chunks of lemon, and very aromatic.
   Tip Removing every seed is essential to avoid bitterness. Use a bench scraper to scoop the lemon wedges into the blender easily.
2. 2Combine dry ingredients
   In a large mixing bowl, whisk together the all-purpose flour and baking powder until evenly distributed. This ensures the baking powder is well incorporated throughout the flour.
   Look for The flour mixture should look uniform, with no streaks of baking powder.
   Tip Whisking the dry ingredients together prevents clumps and helps the cake rise evenly.

After blending, the puree should be a vibrant yellow, velvety liquid with an intense lemon aroma. When you whisk in the flour, the batter should become thick, smooth, and glossy, falling from the whisk in a slow ribbon. It should smell sweet and citrusy, with no raw flour smell. The batter should be free of lumps and have a pourable but thick consistency.

Bake to Golden Perfection

3. 3Fold the batter together
   Pour the lemon puree into the bowl with the flour mixture. Use a whisk to fold everything together until just combined. The batter should be silky and thick, forming a ribbon when lifted with the whisk. Do not overmix.
   Look for The batter is ready when it is smooth, thick, and falls off the whisk in a slow ribbon that holds its shape briefly.
   Tip Overmixing can make the cake tough. Stop as soon as no dry flour remains.
4. 4Prepare the loaf pan
   Grease a 9-inch loaf pan and line it with parchment paper, leaving some overhang on the long sides for easy lifting. This prevents sticking and helps the cake release cleanly.
   Look for The pan should be fully coated, with parchment covering the bottom and sides.
   Tip Using parchment paper with overhang makes it easy to lift the cake out after baking.
5. 5Pour and smooth the batter
   Pour the batter into the prepared loaf pan. Use a spatula or the back of a spoon to smooth the surface evenly, ensuring the batter is level.
   Look for The batter should be evenly distributed, with a smooth top.
   Tip Smoothing the top helps the cake bake evenly and dome nicely.

The cake should rise evenly, forming a domed top that cracks slightly as it bakes. The crust will turn a deep golden brown, and the kitchen will fill with a warm, lemony aroma. A toothpick inserted in the center should come out clean. The cake should feel firm to the touch but spring back slightly when pressed. The internal temperature should be at least 160°F (71°C).

Glaze and Finish

6. 6Bake the cake
   Place the loaf pan in an oven preheated to 340°F (170°C). Bake for 45 minutes, until the cake is deeply golden, domed, and a skewer inserted into the center comes out clean. The top may crack—this is normal and desirable.
   Look for The cake should be deeply golden, with a cracked, domed top. A toothpick inserted in the center comes out clean.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip If the top browns too quickly, loosely tent with foil for the last 10 minutes.
7. 7Cool the cake briefly
   Let the cake cool in the pan for 10 minutes. Then, using the parchment overhang, lift the cake out and transfer it to a wire rack. Let it cool for another 10 minutes before glazing.
   Look for The cake should be firm enough to handle but still warm.
   Tip Cooling on a rack prevents the bottom from becoming soggy.
8. 8Make the glaze
   In a small bowl, whisk together the powdered sugar and lemon juice until smooth. The glaze should be thick but pourable. If it is too thick, add a few drops of lemon juice; if too thin, add a little more powdered sugar.
   Look for The glaze should be smooth, glossy, and thick enough to coat the back of a spoon.
   Tip For a thinner glaze, add lemon juice a teaspoon at a time. For a thicker one, add more powdered sugar.
9. 9Glaze and garnish the cake
   While the cake is still warm, drizzle the glaze evenly over the top. Immediately sprinkle with fresh lemon zest threads. Allow the glaze to set for a few minutes before slicing.
   Look for The glaze should form a shiny, white layer over the golden crust, with flecks of bright zest.
   Tip Glazing while warm helps the glaze soak slightly into the crust, adding extra moisture.
10. 10Slice and serve
    Using a serrated knife, slice the cake into thick pieces. Serve warm or at room temperature. The interior should be moist, tender, and bursting with lemon flavor.
    Look for Each slice shows a moist, tight crumb with a golden crust and a glossy glaze.
    Tip For clean slices, wipe the knife between cuts.

The warm cake should be glossy with the white glaze, which will set into a crackly, sugary shell. The fresh lemon zest adds bright green-yellow flecks and a burst of fresh citrus aroma.

When sliced, the interior should be moist, tender, and pale yellow, with a tight, even crumb. The glaze should be set but still slightly sticky, and the cake should be fragrant with lemon.

Common mistakes

One common mistake is not removing all the seeds from the lemon, which can make the cake bitter. Another is overmixing the batter once the flour is added, which develops gluten and results in a dense, tough crumb. Be gentle—fold until just combined.

Also, be careful not to overbake; check for doneness at the 40-minute mark. Overbaking dries out the cake. Finally, don't skip the parchment paper; it ensures clean release and prevents the cake from sticking.

How to tell it’s done

The cake is done when it is deeply golden brown on top, domed, and a toothpick inserted into the center comes out clean or with just a few moist crumbs attached. The internal temperature should read at least 160°F (71°C) in the center.

If the top is browning too quickly, tent loosely with foil. Let the cake cool in the pan for 10 minutes before lifting it out. The glaze should be drizzled while the cake is still warm so it sets into a glossy, crackly finish.

• Egg dishes: 160°F (71°C) in the thickest part