Position the oven rack in the middle but do not preheat the oven.
Liberally coat a 10-cup Bundt pan with nonstick baking spray and sprinkle sliced almonds on the bottom and sides of the pan (it's fine if many fall to the bottom).
Using a stand mixer, beat butter and sugar on high speed until fluffy and pale, which takes about 4 minutes.
Reduce the speed to medium, and mix in almond extract and eggs one at a time.
At a low speed, gradually add sifted flours, scraping down the sides of the bowl halfway through, until just combined.
Gently pour in the heavy cream and mix for about 30 seconds, then scrape the bowl and mix for another 30 seconds.
Transfer the batter into the prepared pan. Put the pan in a cold oven and set it to bake at 325F for 1 hour and 20 minutes, or until the cake is deeply golden brown and a skewer inserted into it comes out mostly clean with a few moist crumbs.
After baking, let the cake cool in the pan for 15 minutes, then remove and allow it to cool completely for about 30 minutes.
Serve the cake as is or with whipped cream and fresh berries.