Prep your tools. Line a 12-cup muffin tin with paper liners. Preheat the oven to 375°F (190°C). This higher temp helps the muffins rise quickly for a domed top.

Make a flax “egg.” In a small bowl, stir 1 tablespoon ground flaxseed with 3 tablespoons warm water. Let it thicken for 5 minutes until gelled.

Zest, then juice. Finely zest 2 lemons before cutting them. You’ll want about 1–2 tablespoons zest and 2–3 tablespoons fresh juice. Zest adds fragrant oils that boost flavor.

Whisk the dry mix. In a large bowl, whisk 2 cups all-purpose flour, 2 teaspoons baking powder, 1/2 teaspoon baking soda, and 1/2 teaspoon fine sea salt. If using poppy seeds, add 1–2 tablespoons now.

Blend the wet mix. In a separate bowl or large measuring cup, whisk 3/4 cup plant milk, 1/2 cup sugar (or 1/3 cup maple syrup), 1/4 cup neutral oil, the flax “egg,” 1 teaspoon vanilla, 1 tablespoon lemon zest, and 2 tablespoons lemon juice. If you like extra moisture, add 1/4 cup unsweetened applesauce.

Combine gently. Pour the wet mix into the dry ingredients. Stir with a spatula until just combined. A few small lumps are fine. Do not overmix or the muffins can turn dense.

Portion the batter. Divide evenly among the muffin cups, filling each about 3/4 full for nice, rounded tops.

Bake. Place the tin on the center rack. Bake 15–18 minutes, or until the tops are set and a toothpick comes out mostly clean with a few moist crumbs.

Cool. Let muffins cool in the pan for 5 minutes, then transfer to a wire rack. This prevents soggy bottoms and helps the crumb set.

Optional glaze. For a light lemon glaze, whisk 1/2 cup powdered sugar with 1–2 tablespoons fresh lemon juice until smooth. Drizzle over cool muffins. For a lower-sugar option, brush warm muffins with a little lemon juice mixed with a touch of maple syrup.