
Bright, citrusy, and dotted with poppy seeds, this cake is the kind of thing you'd happily bring to a brunch table or afternoon gathering — and it slices beautifully into 10 generous pieces. The trick to getting a tender, fluffy crumb without eggs or dairy is a two-part swap: flax eggs made from ground flaxseed and water, and a quick vegan buttermilk created by letting plant-based milk curdle with apple cider vinegar. Both are simple pantry moves that genuinely work, giving the batter the lift and moisture a classic lemon cake needs. Softened vegan butter creamed with organic cane sugar builds a light, pale base, and fresh lemon zest and juice woven through the batter mean the citrus flavor is real and bright — not artificial. Once the cake cools completely, a pourable glaze of sifted powdered sugar and more fresh lemon juice sets into a glossy, tangy finish that makes every slice look bakery-worthy. No eggs, no dairy, no compromise on flavor — just a genuinely crowd-pleasing cake that happens to be entirely plant-based.
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In a small bowl, stir together the ground flaxseed and 6 tbsp water until combined. Set aside for 5 minutes until the mixture thickens to a gel.
Preheat the oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with a circle of parchment paper.
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