In a blender, combine the spinach, buttermilk, egg, and oil and blend until smooth.: You will smell fresh green notes as the spinach breaks down, and the mixture should become vibrant and uniform in color, almost like a pale emerald cream. The blades will soften the leaves so the batter has no fibrous bits, ensuring a silky texture on the griddle. I like to pulse first to reduce large pieces, then blend at medium speed until fully smooth. A common mistake is overfilling the blender, which can lead to uneven blending, so work in a manageable quantity. If the mixture looks too thin, a brief rest lets tiny air bubbles settle, and you can adjust with a spoonful more flour later if needed. Visually, you want a pourable, slightly thick liquid, not watery.
In a separate bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.: As you whisk the dry all purpose flour and leaveners, you will create an even, pale mixture without clumps, which is crucial for consistent rise. The act of whisking aerates the dry ingredients, helping the pancakes stay light, and the sugar disperses so it browns uniformly. I tap the bowl gently to settle the mixture and run my fingers through to check for lumps. Avoid packing the flour into the measuring cup, because that leads to dense pancakes. If you see any lumps, sift or press them out with the whisk so the batter mixes quickly when you combine the wet and dry.
Whisk the wet ingredients into the dry ingredients until just combined. Be careful not to overmix.: When you pour the blended wet mix into the dry bowl, the sound should be smooth, and you will see streaks of green fade into a cohesive batter. Stir gently until you cannot see large pockets of dry flour . The texture should be slightly lumpy, not glassy or runny, because overmixing develops gluten and yields chewy pancakes. I always stop when small flour streaks remain; the residual mixing while cooking finishes the job. A frequent error is vigorous stirring, which creates tough pancakes, so be deliberate and patient. The batter should hold its shape when dropped from a spoon, with a slow, steady pour.
Heat a large pan or griddle over medium heat and grease with butter or oil. Pour about 1 tablespoon of the pancake mixture onto the griddle, making as many pancakes as will fit and cook for 2 minutes.: As the batter hits the hot surface you will hear a soft sizzling sound and see tiny bubbles forming at the edges within the first minute. The pan should be hot enough to create color without burning, so test with a small drop; it should sizzle gently. Butter adds a nutty aroma, while oil resists burning, so choose based on flavor preference. Cook until you notice the edges becoming matte and small holes form across the top, these are your visual cues. A common pitfall is too high heat, which browns the outside before the center sets. Keep the heat steady and work in small batches for consistent results.
Flip the pancakes and cook for one minute longer.: After flipping, you should see a light golden brown surface and feel a springy give when touched with a spatula. The second side cooks faster, finishing the center without overbrowning. Listen for a lowered sizzle, which signals that the interior has set and the exterior is sealing. If the face browns too quickly, reduce the heat, because that indicates the center is still undercooked. I flip confidently and return the pancake to the pan for a brief finish, aiming for a tender, moist inside. Overcooking here will result in dryness, so watch the color and timing closely.
Serve warm with favorite toppings.: When plated, the pancakes should be warm, slightly springy, and softly tender. I enjoy stacking them and adding a pat of butter or a drizzle of syrup for contrast, but savory toppings also work because the spinach gives a subtle savory note. Serving immediately preserves the best texture, since they will soften as they cool. If you must hold them, keep them loosely tented in a warm oven to maintain heat and prevent sogginess. A typical mistake is piling them and letting steam accumulate, which makes them limp, so give them a moment on a rack if you are stacking many.