Add your frozen mango chunks, coconut milk, coconut cream, sugar, lime juice, vanilla extract, and sea salt to a high-powered blender. Blend on high speed for 90 seconds, stopping to scrape the sides halfway through. I always forget this scraped-side step and end up with chunks—don't be me.
Sprinkle the agar-agar powder directly into the blender while it's running on medium speed. This prevents clumping, which happens when you dump it all at once. Blend for another 45 seconds until completely smooth. The mixture should look uniform and thicker than before—you'll feel the difference as resistance increases against the blender blades.
Pour the mango coconut ice cream crowd summer base into a metal loaf pan, smoothing the top with an offset spatula. Metal conducts cold faster than glass, which matters for texture. Cover tightly with plastic wrap, pressing it directly onto the surface so no ice crystals form. This step is why the final result stays creamy—it prevents those grainy patches everyone hates.
Freeze for 30 minutes until the edges firm up but the center stays soft—this is called the "soft-set" stage. Use a fork to stir the frozen portions toward the center, breaking up any ice crystals forming along the edges. Return it to the freezer uncovered for exactly 20 more minutes. I know this sounds fussy, but this double-freeze technique is what separates this crowd tropical frozen dessert from mediocre versions.
Remove from freezer and stir one final time with a fork, incorporating all the edges into the center. Fold in the finely chopped pistachios and toasted coconut flakes, stirring just until combined—overmixing deflates the texture. Cover and freeze for at least 4 hours, though overnight is ideal. The mango coconut ice cream crowd summer needs time to reach perfect scoop consistency.
Remove from freezer 5 minutes before serving and drizzle with honey. Sprinkle the ground cardamom over each portion just before you scoop. This timing matters because cardamom flavor blooms when it touches the cold surface. Scoop into bowls and serve immediately while the texture is at its peak.