In a large mixing bowl, beat butter and sugar until creamy. Add egg and butter flavoring.
Add flour and baking powder and beat until combined. Fold in 2 Tbsp sprinkles.
Line a large baking sheet with parchment paper (or a silpat). Divide dough in half and shape into two 10inch x 2.5inch rectangles. Use flour on your fingertips to keep dough from sticking.
Bake in a 350 degree oven for 25 minutes. Remove and cool 10 minutes. Using a serrated knife, cut each rectangle into 9-10 slices each. Turn each slice onto it's side. Bake an additional 10 minutes. Flip biscotti onto opposite sides. Bake another 8-10 minutes. Remove and cool completely.
Once cooled, dip tops of biscotti into melted white chocolate. Add sprinkles immediately. ENJOY.
Notes
If you can't find butter flavoring, just swap it out for vanilla extract instead.
Can’t find butter flavoring? Swap it out for vanilla extract in this biscotti recipe.
Flip the biscotti halfway through their second bake to ensure both sides get fully baked.
Store biscotti in an airtight container at room temperature. Enjoy within 2 weeks.
Feel free to use different sprinkle colors for different holidays and occasions!