Fluffy Polish Buns (Print Version)

# Ingredients:

→ Dough

01 - 1 egg
02 - ½ tsp salt
03 - 4 cups all-purpose flour
04 - 2 ¼ tsp instant yeast
05 - ¼ cup sugar
06 - 1 cup warm milk
07 - ½ cup unsalted butter, melted
08 - 1 tsp vanilla extract

→ Blueberry Filling

09 - ¼ cup sugar
10 - 1 tbsp cornstarch
11 - 2 cups fresh blueberries

→ Streusel Topping

12 - 2 tbsp sugar
13 - 2 tbsp cold butter, cubed
14 - ¼ cup all-purpose flour

→ Optional Additions

15 - Cinnamon in the streusel
16 - Powdered sugar glaze for added sweetness
17 - Almond flakes for a nutty crunch
18 - Lemon zest for extra freshness

# Instructions:

01 - In a bowl, stir together the yeast, warm milk, and sugar. Leave it untouched for 5-10 minutes until it gets bubbly. Add vanilla, melted butter, salt, and an egg. Slowly mix in the flour until you get dough. Knead it for 8-10 minutes until it's stretchy and smooth. Cover with a towel and place somewhere warm for 1-1.5 hours until it doubles in size.
02 - Combine cornstarch, blueberries, and sugar in a bowl. Toss them together and set the bowl aside.
03 - Set your oven to 375°F (190°C) and line a baking tray with parchment paper. Punch down the dough and split it into 10-12 pieces. Flatten each one into a disc, put a spoonful of blueberry mix in the middle, and pinch the edges shut. Lay the buns seam-side down on the tray.
04 - Use your fingers to rub together butter, flour, and sugar in a bowl until it feels crumbly. Brush the buns with some milk or egg wash, then sprinkle the streusel on top. Bake for 18-22 minutes until they're golden brown. Let the buns cool a bit before digging in.

# Notes:

01 - Use slightly warm milk (not hot) so the yeast activates better.
02 - Keep the dough rising in a cozy spot with no drafts for fluffier results.
03 - Dust the blueberries with cornstarch to keep the bun dough from getting too wet.
04 - Don't overstuff the buns, or they might split open while baking.