1-First Step: Begin by preparing your oven and baking pan. Preheat your oven to 350 degrees Fahrenheit. It is crucial that the oven is fully hot before the batter goes in to ensure the cake rises properly. While the oven heats, generously butter a 9×13 inch baking pan. You can also line the bottom with parchment paper for easier removal later, especially if you plan to gift the cake or transport it.

2-Second Step: The secret to the height and texture of this cake lies in the eggs. Crack the 3 eggs into a large mixing bowl and add the 2 cups of sugar. Using an electric mixer, beat this mixture on medium-high speed for 5 to 7 minutes. Do not rush this step. You want the eggs to thicken, lighten in color to a pale yellow, and nearly double in size. The mixture is ready when it forms a ribbon when you lift the beaters out. This means the batter should fall back into the bowl in a slow, dissolving ribbon rather than disappearing immediately. This aeration replaces the need for baking powder or baking soda.

3-Third Step: Once the egg and sugar mixture is ready, add the 3/4 cup of softened butter and the 1 teaspoon of vanilla. Turn the mixer back on and mix for another 2 minutes. The batter should look smooth and creamy. Make sure your butter is softened to room temperature so it incorporates easily without leaving lumps. This step adds the rich fat content that makes the cake moist and tender.

4-Fourth Step: Turn off the mixer and add the 2 cups of all-purpose flour (or your gluten-free alternative). Stir the flour in by hand or mix on the lowest speed setting just until combined. Be careful not to overmix at this stage. Overmixing can develop the gluten in the flour too much, leading to a tougher cake. You want to retain the air bubbles you worked so hard to create in the previous step. The batter will be very thick, almost like cookie dough.

5-Fifth Step: Gently fold in the 12 ounces of fresh cranberries. If you are using frozen cranberries, make sure they are thawed slightly and patted dry to prevent excess water from thinning the batter. Use a spatula to fold the berries in, being gentle to avoid crushing them. The tart berries will pop against the sweet yellow batter, creating a beautiful contrast. If you want to add nuts or orange zest, this is the moment to do it.

6-Sixth Step: Spread the thick batter into your prepared 9×13 pan. Because the batter is dense, you will need to press it into the corners and level the top with a spatula or the back of a spoon. You can wet your spatula with water to prevent the batter from sticking to it as you spread it. Ensure the surface is as even as possible so it bakes uniformly.

7-Seventh Step: Place the pan in the center of your preheated oven. Bake for 40 to 50 minutes. Around the 43-minute mark, start checking for doneness. The cake is ready when the top is lightly browned and a toothpick inserted near the center comes out clean or with just a few moist crumbs attached. The top should have a lovely, crackly crust.

8-Final Step: Remove the cake from the oven and let it cool completely in the pan. This is important because the cake is very fragile when warm. Cutting it too early can cause it to crumble. Once cooled, cut the cake into small pieces, approximately 1 inch by 2 inches. This size is perfect for serving at parties or packing into lunchboxes.