Preheat the oven to 350℉. Spray a 9-inch round baking pan with baking spray (nonstick spray with flour).: The moment the oven begins warming you will smell a faint metallic heat that signals the environment is getting ready to transform the batter. Preheating to 350℉ ensures the cake hits the oven at the right temperature so it rises steadily, rather than collapsing from a slow start. Preparing a 9-inch round pan with baking spray that contains flour creates a nonstick barrier and helps the exterior release cleanly; otherwise the cake can cling and tear when inverted. A common mistake is skipping preheat or placing the cake in a slightly cool oven which can cause uneven rise and a dense center. Make sure the pan is evenly coated and tap out any excess spray to avoid greasy pools.
In a large bowl, whisk together the sugar, salt, eggs, butter, almond extract and vanilla. Add the flour, and stir with a wooden spoon until just blended.: As you whisk, notice the sugar dissolving slightly into the eggs , the mixture loosening into a glossy state that catches the light. The aroma of the almond extract will become immediate and fragrant, signaling the cake's identity. Incorporating the melted yet cooled butter at this stage adds silkiness without cooking the eggs , which keeps the batter smooth. If the mixture looks curdled or grainy, it often means the butter was too hot, so allow it to cool longer next time. Gentle whisking prevents over aeration, which could create large tunnels in the baked cake.
Spread the batter evenly in the prepared pan. Sprinkle with almonds.: When you add the all purpose flour , fold it in gently with a wooden spoon until you see no streaks of dry flour. The batter should be cohesive and slightly thick, not runny. Overmixing develops gluten and yields a tougher crumb, while undermixing leaves pockets of dry flour. The sound here is quiet, a soft scraping as the spoon moves through the batter, and the visual cue is a smooth consistency with a few small air bubbles. If you notice a gummy texture, it is likely overmixed; stop stirring and proceed to baking quickly to avoid a dense result.
Bake in a preheated oven for 35 to 40 minutes or until a toothpick inserted into the center comes out with a few moist crumbs attached. Let cool in the pan on a wire rack for 15 minutes. Run a knife around the edge of the pan, then invert the cake onto the rack. Spread the warm cake with apricot jam. Let cool completely.: When you transfer the batter to the pan, use a spatula to level the surface so it bakes uniformly. The batter should settle into the corners without force, and you'll see it flatten into a glossy top. Sprinkle the sliced almonds evenly; they will brown and crisp during baking, offering a crunchy contrast to the tender crumb. Pressing the almonds lightly into the batter helps them adhere, preventing them from sliding off when inverted. A common error is piling too many almonds in one spot which creates uneven browning, so distribute them with intention.
Bake in a preheated oven for 35 to 40 minutes or until a toothpick inserted into the center comes out with a few moist crumbs attached.: The oven will give you the first sign as the top develops a light golden color and a toasty almond aroma fills the kitchen. Baking for the indicated time at 350℉ lets the cake set while staying moist inside. The toothpick test is sensory too, you want a few moist crumbs not raw batter, which indicates the center is done but still tender. If the top browns too quickly, tent with foil to prevent overbrowning while the center finishes. Taking it out too soon can mean a gooey center, and leaving it too long dries the crumb, so aim for that perfect balance.
Let cool in the pan on a wire rack for 15 minutes.: Cooling in the pan for the first 15 minutes lets the structure firm up slightly so it does not collapse when removed. During this time steam escapes and settles, and the cake becomes easier to handle. You will notice the aroma mellows and the top feels just warm to the touch. Avoid the temptation to flip it out immediately, or you risk tearing. If the cake seems stuck after 15 minutes, run a thin knife around the edge before inverting to release any points that adhered to the pan.
Run a knife around the edge of the pan, then invert the cake onto the rack.: Running a knife gently around the edge ensures the cake releases cleanly without ripping. When you invert it onto a wire rack, listen for the subtle sigh as the cake separates from the pan. The underside will show the pattern of the pan briefly before settling into its final appearance. If the cake resists, tap the pan lightly or warm the bottom slightly for a few seconds; forcing it can cause breakage.
Spread the warm cake with apricot jam.: Spreading apricot jam while the cake is still warm allows the jam to meld into the surface, creating a glossy layer that seeps into the top crumbs. The aroma becomes fruitier and brighter, contrasting the nuttiness of the almonds . Use a spoon to dollop and a small offset spatula to smooth without tearing the cake. If the jam is too cool and stiff, warm it for a few seconds to loosen; if too hot, it may run off the sides.
Let cool completely.: Allowing the cake to cool fully is crucial for clean slicing and stable texture. As it cools the crumb firms and the jam sets slightly. The residual warmth will continue to distribute moisture so the cake reaches its ideal balance. If you slice too soon, the cake may crumble or the jam may smear, so patience yields the most attractive presentation and best mouthfeel.