Follow these easy steps to create Cheesy Thumbprint Appetizers with Hot Pepper Jelly:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C). This ensures that the temperature is right for baking.

2. Mix Ingredients: In a large mixing bowl, combine the softened butter and shredded cheddar cheese. Mix until creamy.

3. Add Dry Ingredients: Gradually incorporate the all-purpose flour, garlic powder, onion powder, salt, and black pepper into the cheese mixture. Stir until everything is well combined and forms a dough.

4. Form the Dough: Using your hands, shape the dough into small balls, roughly one inch in diameter, and place them on a parchment-lined baking sheet.

5. Create Thumbprints: With your thumb or the back of a spoon, gently press down in the center of each ball to create a small indentation for the jelly.

6. Add Jelly and (Optional) Egg Wash: Spoon a small amount of hot pepper jelly into each thumbprint. If you desire, brush the tops with egg yolk for a glossy finish.

7. Bake: Place the baking sheet in the preheated oven and bake for 15-20 minutes or until the edges are lightly golden. Remove from oven and let cool slightly before serving.

With these steps, you will create amazing cheesy thumbprint appetizers that burst with flavor!