Naturally sweet red date cake with rich jujube flavor is a nourishing Chinese treat. A family recipe with fresh, wholesome date sweetness.
Preheat oven to 350°F (175°C). Line an 8-inch square pan with parchment paper for easy removal.
Soak the dried red dates in hot water for 10–15 minutes, drain well, then blend with 1/2 cup water into a smooth paste. Set aside.
In a large bowl, whisk together eggs and brown sugar until thick and pale; slowly add the red date paste and vegetable oil, mixing until well combined.
Sift in the flour, baking powder, baking soda, and salt. Gently fold until just combined, being careful not to overmix. Fold in walnuts if using.
Pour batter into prepared pan, smoothing the top. Tap the pan gently to release air bubbles.
Bake in the center of the oven for 35–40 minutes, checking doneness by inserting a toothpick— it should come out clean or with a few moist crumbs.
Let cake cool completely in the pan to maintain moisture, then slice and serve. Store leftovers in an airtight container.