Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment and spray with nonstick spray. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugar until light and fluffy.
10 tablespoons unsalted butter, ¾ cup granulated sugar
Add in the eggs and vanilla. Mix until combined.
1 teaspoon pure vanilla extract, 3 large eggs
Sift in the flour and baking powder and mix.
2½ cups all-purpose flour, 1 teaspoon baking powder
Melt the chocolate in the microwave in 20-second intervals until completely melted. Make sure you don’t burn it. Once it’s ready, add it to the mixture.
1 cup white chocolate chips
Fold in the sliced almonds.
2 tablespoons sliced almonds
Pour the batter into the lined pan and spread with a spatula until even.
Add in the raspberries one-by-one, distributed all over the pan.
1 cup frozen raspberries
Bake for 20 minutes, or until a toothpick comes out clean. Since they are very light, make sure to not overbake. They should look undercooked.
Remove from the oven and let it cool. Once cool, take out the blondies and cut into even squares.
Melt more chocolate and drizzle on top, if desired.