01 -
Line a 23x23 cm (9x9 inch) baking pan with parchment paper, leaving overhang on the sides for easy removal.
02 -
In a stand mixer, cream together butter, sugar, and vanilla extract until light and fluffy.
03 -
Microwave the flour in a microwave-safe bowl until it reaches 72°C (160°F) to eliminate any bacteria. Allow to cool slightly.
04 -
Add the heat-treated flour to the butter mixture and blend thoroughly.
05 -
In a separate bowl, melt the sweetened condensed milk and white chocolate together, then fold into the flour mixture until fully incorporated.
06 -
Gently fold in the fresh blueberries, blue food coloring, and purple food coloring until evenly distributed.
07 -
Pour the fudge mixture into the prepared pan, spread evenly, and refrigerate overnight until completely set.
08 -
Preheat oven to 200°C (400°F). In a medium bowl, combine rolled oats, brown sugar, vanilla extract, and honey until well mixed.
09 -
Spread the oat mixture on a parchment-lined baking sheet and bake for 10 minutes, stirring every 3-4 minutes until golden brown. Allow to cool completely.
10 -
Cut the chilled fudge into 5 cm (2 inch) squares. Sprinkle with the baked streusel topping and garnish with additional fresh blueberries before serving.